[tests] adds some %{dep:file}

tests/spec/multiple_file_1.c

 /* run.config
-   OPT: -print @PTEST_DIR@/multiple_file_2.c
+   OPT: -print %{dep:@PTEST_DIR@/multiple_file_2.c}
 */
 
 /* see bug #43 */

tests/syntax/merge_inline_1.c

 /* run.config
-OPT: @PTEST_DIR@/merge_inline_2.c -aggressive-merging -print
+OPT: %{dep:@PTEST_DIR@/merge_inline_2.c} -aggressive-merging -print
 */
 
 /* Test that we rename properly inlines even if they have prototypes and

tests/syntax/typedef_multi_2.c

 /* run.config
-DONTRUN: main test is at @PTEST_DIR@/typedef_multi_1.c
+DONTRUN: main test is at %{dep:@PTEST_DIR@/typedef_multi_1.c}
 */
 
 #include "typedef_multi.h"