re PR fortran/87725 (OpenMP 4.5 clause schedule(simd,monotonic:static) not understood)

	PR fortran/87725
	* openmp.c (gfc_match_omp_clauses): Parse simd, monotonic and
	nonmonotonic modifiers regardless of if they have been parsed
	already or if the opposite one has.  Fix up check whether
	comma after modifier should be parsed.
	(resolve_omp_clauses): Diagnose schedule modifier restrictions.

	* c-c++-common/gomp/schedule-modifiers-1.c (bar): Separate modifier
	from kind with a colon rather than comma.
	* gfortran.dg/gomp/schedule-modifiers-1.f90: New test.
	* gfortran.dg/gomp/schedule-modifiers-2.f90: New test.

From-SVN: r265479