c-attribs.c (c_common_attribute_table): Add "omp declare target implicit" attribute.

c-attribs.c (c_common_attribute_table): Add "omp declare target implicit" attribute.

	* c-attribs.c (c_common_attribute_table): Add
	"omp declare target implicit" attribute.

	* c-decl.c (c_decl_attributes): Don't diagnose vars without mappable
	type here, instead add "omp declare target implicit" attribute.
	(finish_decl): Diagnose vars without mappable type here.

	* decl2.c (cplus_decl_attributes): Don't diagnose vars without mappable
	type here, instead add "omp declare target implicit" attribute.  Add
	that attribute instead of "omp declare target" also when
	processing_template_decl.
	* decl.c (cp_finish_decl): Diagnose vars without mappable type here,
	and before calling cp_omp_mappable_type call complete_type.

	* c-c++-common/gomp/declare-target-3.c: New test.
	* g++.dg/gomp/declare-target-2.C: New test.

From-SVN: r262605