[tests] Update Oracles

tests/cil/oracle/cpu_a.res.oracle

@@ -2,6 +2,7 @@
 [kernel] Parsing cpu_b.c (with preprocessing)
 [kernel] cpu_b.c:7: Warning: 
   Integer compatibily is machine-dependant : unsigned short and unsigned int
+[kernel] Warning: Conflicting definitions are between files cpu_a.c and cpu_b.c
 /* Generated by Frama-C */
 typedef unsigned short DWORD;
 DWORD f(void)

tests/cil/oracle/cpu_b.res.oracle

@@ -2,6 +2,7 @@
 [kernel] Parsing cpu_a.c (with preprocessing)
 [kernel] cpu_a.c:6: Warning: 
   Integer compatibily is machine-dependant : unsigned int and unsigned short
+[kernel] Warning: Conflicting definitions are between files cpu_b.c and cpu_a.c
 /* Generated by Frama-C */
 typedef unsigned int DWORD;
 DWORD f(void);