c-family/

c-family/
	* c-common.h (enum rid): Add RID_IS_TRIVIALLY_ASSIGNABLE and
	RID_IS_TRIVIALLY_CONSTRUCTIBLE.
	* c-common.c (c_common_reswords): Add __is_trivially_copyable.
cp/
	* cp-tree.h (cp_trait_kind): Add CPTK_IS_TRIVIALLY_ASSIGNABLE and
	CPTK_IS_TRIVIALLY_CONSTRUCTIBLE.
	* cxx-pretty-print.c (pp_cxx_trait_expression): Likewise.
	* parser.c (cp_parser_primary_expression): Likewise.
	(cp_parser_trait_expr): Likewise.  Handle variadic trait.
	* semantics.c (trait_expr_value): Likewise.
	(finish_trait_expr): Likewise.
	(check_trait_type): Handle variadic trait.  Return bool.
	* method.c (build_stub_object): Add rvalue reference here.
	(locate_fn_flags): Not here.
	(check_nontriv, assignable_expr, constructible_expr): New.
	(is_trivially_xible): New.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@215738 138bc75d-0d04-0410-961f-82ee72b054a4