[C++ PATCH] parser simplification

[C++ PATCH] parser simplification

https://gcc.gnu.org/ml/gcc-patches/2018-10/msg00689.html
	cp/
	* parser.c (cp_parser_translation_unit): Return void.  Don't fail
	at first extra }, simplify logic.
	(c_parse_file): Call finish_translation_unit here.

	testsuite/
	* g++.dg/parse/close-brace.C: New.
	* g++.dg/cpp0x/noexcept16.C: Avoid warning.
	* g++.old-deja/g++.other/crash32.C: Add another error

From-SVN: r265055