openmp: Avoid ICE on depend clause on depobj OpenMP construct [PR98072]

openmp: Avoid ICE on depend clause on depobj OpenMP construct [PR98072]

Since r11-5430 we ICE on the following testcase.  When parsing the depobj
directive we don't really use cp_parser_omp_all_clauses routine which ATM
disables generation of location wrappers and the newly added assertion
that there are no location wrappers thus triggers.

Fixed by adding the location wrappers suppression sentinel.

Longer term, we should handle location wrappers inside of OpenMP clauses.

2020-12-01  Jakub Jelinek  <jakub@redhat.com>

	PR c++/98072
	* parser.c (cp_parser_omp_depobj): Suppress location wrappers when
	parsing depend clause.

	* c-c++-common/gomp/depobj-2.c: New test.