re PR bootstrap/68271 (Boostrap fails on x86_64-apple-darwin14 at r230084)

re PR bootstrap/68271 (Boostrap fails on x86_64-apple-darwin14 at r230084)

	PR bootstrap/68271
	* parser.h (cp_token): Remove pragma_kind field.  Add comment
	with number of unused bits.
	* parser.c (eof_token): Remove pragma_kind field initializer.
	(cp_lexer_get_preprocessor_token): Don't set pragma_kind
	field, don't clear CPP_PRAGMA u.value.
	(cp_parser_pragma_kind): New function.
	(cp_parser_omp_sections_scope, cp_parser_oacc_kernels_parallel,
	cp_parser_omp_construct, cp_parser_initial_pragma,
	cp_parser_pragma): Use cp_parser_pragma_kind instead of accessing
	pragma_kind field.

	* c-pragma.c (c_register_pragma_1): Adjust comment to note that
	C++ FE no longer has limit on number of pragmas.

From-SVN: r232451