c-common.h (enum cxx_dialect): Add cxx1y.

c-common.h (enum cxx_dialect): Add cxx1y.

	* c-common.h (enum cxx_dialect): Add cxx1y.
	* c-common.c (c_common_nodes_and_builtins): Use >= for cxx_dialect
	test.
	* c-cppbuiltin.c (c_cpp_builtins): Likewise.
	* c-opts.c (c_common_post_options): Likewise.
	(set_std_cxx1y): New.
	(c_common_handle_option): Call it.
	* c.opt (-std=c++1y, -std=gnu++1y): New flags.
cp/
	* lex.c (init_reswords): Use >= for cxx_dialect test.
	* parser.c (cp_parser_exception_specification_opt): Likewise.
testsuite/
	* lib/target-supports.exp: Add { target c++1y }.

From-SVN: r185596