[tests] prevent future conflicts in test oracle

tests/metrics/libc.c

 /* run.config
-   STDOPT: #"-metrics-no-libc -metrics-eva-cover"
-   STDOPT: #"-metrics-libc -metrics-eva-cover"
+ EXECNOW: LOG @PTEST_NAME@_metrics.res LOG @PTEST_NAME@_metrics.err @frama-c@ @PTEST_FILE@ -metrics -metrics-libc -then -metrics-no-libc | @PTEST_SUITE_DIR@/../libc/check_some_metrics.sh "> 5" "> 100" "= 0" "> 10" "= 2"  "= 6" "= 0" "= 0" "= 0" "= 4" >@PTEST_NAME@_metrics.res 2>@PTEST_NAME@_metrics.err
+   STDOPT: #"-metrics-eva-cover"
    LOG: libc.json
    STDOPT: #"-metrics-libc -metrics-output @PTEST_RESULT@/libc.json"
 */

tests/metrics/oracle/libc.1.res.oracle

 [kernel] Parsing libc.c (with preprocessing)
-[metrics] Defined functions (7)
-  =====================
-   bar (1 call); f (0 call); foo (1 call); g (address taken) (0 call);
-   getopt (1 call); h (1 call); main (0 call); 
-  
-  Specified-only functions (124)
-  ==============================
-   _exit (0 call); access (0 call); asprintf (0 call); chdir (0 call);
-   chown (0 call); chroot (0 call); clearerr (0 call);
-   clearerr_unlocked (0 call); close (0 call); dup (0 call); dup2 (0 call);
-   execl (0 call); execle (0 call); execlp (0 call); execv (0 call);
-   execve (0 call); execvp (0 call); fclose (0 call); fdopen (0 call);
-   feof (0 call); feof_unlocked (0 call); ferror (0 call);
-   ferror_unlocked (0 call); fflush (0 call); fgetc (0 call); fgetpos (0 call);
-   fgets (0 call); fileno (0 call); fileno_unlocked (0 call);
-   flockfile (0 call); fopen (0 call); fork (0 call); fputc (0 call);
-   fputs (0 call); fread (0 call); freopen (0 call); fseek (0 call);
-   fseeko (0 call); fsetpos (0 call); ftell (0 call); ftello (0 call);
-   ftrylockfile (0 call); funlockfile (0 call); fwrite (0 call); getc (0 call);
-   getc_unlocked (0 call); getchar (1 call); getchar_unlocked (0 call);
-   getcwd (0 call); getegid (0 call); geteuid (0 call); getgid (0 call);
-   gethostname (0 call); getopt_long (0 call); getopt_long_only (0 call);
-   getpgid (0 call); getpgrp (0 call); getpid (0 call); getppid (0 call);
-   getresgid (0 call); getresuid (0 call); gets (0 call); getsid (0 call);
-   getuid (0 call); isalnum (0 call); isalpha (1 call); isascii (0 call);
-   isatty (0 call); isblank (1 call); iscntrl (0 call); isdigit (0 call);
-   isgraph (0 call); islower (0 call); isprint (0 call); ispunct (0 call);
-   isspace (0 call); isupper (0 call); isxdigit (0 call); lseek (0 call);
-   pathconf (0 call); pclose (0 call); perror (0 call); pipe (0 call);
-   popen (0 call); putc (0 call); putc_unlocked (0 call); putchar (0 call);
-   putchar_unlocked (0 call); puts (0 call); read (0 call); remove (0 call);
-   rename (0 call); rewind (0 call); setbuf (0 call); setegid (0 call);
-   seteuid (0 call); setgid (0 call); sethostname (0 call); setpgid (0 call);
-   setregid (0 call); setresgid (0 call); setresuid (0 call);
-   setreuid (0 call); setsid (0 call); setuid (0 call); setvbuf (0 call);
-   sleep (0 call); sync (0 call); sysconf (0 call); tmpfile (0 call);
-   tmpnam (0 call); tolower (0 call); toupper (0 call); ttyname (0 call);
-   ungetc (0 call); unlink (0 call); usleep (0 call); vfprintf (0 call);
-   vfscanf (0 call); vprintf (0 call); vscanf (0 call); vsnprintf (0 call);
-   vsprintf (0 call); write (0 call); 
-  
-  Undefined and unspecified functions (0)
-  =======================================
-   
-  
-  'Extern' global variables (12)
-  ==============================
-   Frama_C_entropy_source; __fc_errno; __fc_fds; __fc_heap_status;
-   __fc_hostname; __fc_stdin; __fc_stdout; __fc_ttyname; optarg; opterr;
-   optind; optopt
-  
-  Potential entry points (2)
-  ==========================
-   f; main; 
-  
-  Global metrics
-  ============== 
-  Sloc = 20
-  Decision point = 0
-  Global variables = 18
-  If = 0
-  Loop = 0
-  Goto = 0
-  Assignment = 9
-  Exit point = 7
-  Function = 131
-  Function call = 8
-  Pointer dereferencing = 1
-  Cyclomatic complexity = 7
-[eva] Analyzing a complete application starting at main
-[eva] Computing initial state
-[eva] Initial state computed
-[eva:initial-state] Values of globals at initialization
-  fp ∈ {{ &g }}
-[eva] using specification for function isalpha
-[eva] using specification for function isblank
-[eva] done for function main
-[eva:summary] ====== ANALYSIS SUMMARY ======
-  ----------------------------------------------------------------------------
-  5 functions analyzed (out of 6): 83% coverage.
-  In these functions, 13 statements reached (out of 13): 100% coverage.
-  ----------------------------------------------------------------------------
-  No errors or warnings raised during the analysis.
-  ----------------------------------------------------------------------------
-  0 alarms generated by the analysis.
-  ----------------------------------------------------------------------------
-  Evaluation of the logical properties reached by the analysis:
-    Assertions        0 valid     0 unknown     0 invalid      0 total
-    Preconditions     2 valid     0 unknown     0 invalid      2 total
-  100% of the logical properties reached have been proven.
-  ----------------------------------------------------------------------------
-[metrics] Eva coverage statistics
-  =======================
-  Syntactically reachable functions = 8 (out of 131)
-  Semantically reached functions = 8
-  Coverage estimation = 100.0%
-[metrics] References to non-analyzed functions
-  ------------------------------------
-[metrics] Statements analyzed by Eva
-  --------------------------
-  18 stmts in analyzed functions, 18 stmts analyzed (100.0%)
-  bar: 2 stmts out of 2 (100.0%)
-  foo: 2 stmts out of 2 (100.0%)
-  g: 2 stmts out of 2 (100.0%)
-  getopt: 5 stmts out of 5 (100.0%)
-  h: 2 stmts out of 2 (100.0%)
-  main: 5 stmts out of 5 (100.0%)

tests/metrics/oracle/libc.2.res.oracle

-[kernel] Parsing libc.c (with preprocessing)

tests/metrics/oracle/libc_metrics.res

+Checking libc metrics...
+Checking run 1...
+Checking run 2...
+Finished checking libc metrics.