analyzer: start adding test coverage for OpenMP [PR109016]

gcc/testsuite/ChangeLog:
	PR analyzer/109016
	* gcc.dg/analyzer/omp-parallel-for-1.c: New test.
	* gcc.dg/analyzer/omp-parallel-for-get-min.c: New test.

Signed-off-by: David Malcolm <dmalcolm@redhat.com>