[tests] adds use of dune dependency for fowrward compatibility

tests/misc/global_decl_loc.i

 /* run.config
  COMMENT: with dune, the LIBS directive must be replaced by a MODULE directive (see also ./test_config file)
  LIBS: global_decl_loc
-   OPT: @PTEST_DIR@/global_decl_loc2.i
+   OPT: %{dep:@PTEST_DIR@/global_decl_loc2.i}
  */
 
 int g;

tests/misc/global_decl_loc2.i

 /* run.config*
  COMMENT: with dune, the LIBS directive must be replaced by a MODULE directive (see also ./test_config file)
  LIBS: global_decl_loc
-
+ DEPS: @PTEST_DIR@/global_decl_loc.i
    OPT: @PTEST_DIR@/global_decl_loc.i
 */
 extern int g;