re PR fortran/79154 (omp declare simd in pure function?)

re PR fortran/79154 (omp declare simd in pure function?)

	PR fortran/79154
	* parse.c (matchs, matcho, matchds, matchdo): Replace return st;
	with { ret = st; goto finish; }.
	(decode_omp_directive): Allow declare simd, declare target and
	simd directives in PURE/ELEMENTAL procedures.  Only call
	gfc_unset_implicit_pure on successful match of other procedures.

	* gfortran.dg/gomp/pr79154-1.f90: New test.
	* gfortran.dg/gomp/pr79154-2.f90: New test.

From-SVN: r244763