[OpenMP] Fix libomptarget negative tests to expect abort

On runtime failures, D83963 causes the runtime to abort instead of
merely exiting with a non-zero value, but many tests in the
libomptarget test suite still expect the former behavior.  This patch
updates the test suite and was discussed in post-commit comments on
D83963 and D84557.

openmp/libomptarget/test/lit.cfg

@@ -114,7 +114,7 @@ for libomptarget_target in config.libomptarget_all_targets:
             "%t-" + libomptarget_target))
         config.substitutions.append(("%libomptarget-run-fail-" + \
             libomptarget_target, \
-            "%not %t-" + libomptarget_target))
+            "%not --crash %t-" + libomptarget_target))
         config.substitutions.append(("%clangxx-" + libomptarget_target, \
             "%clangxx %openmp_flags %flags -fopenmp-targets=" + libomptarget_target))
         config.substitutions.append(("%clang-" + libomptarget_target, \