A few parser cleanups

A few parser cleanups

	gcc/cp/
	* parser.c (cp_lexer_alloc): Remove pch finalizing.
	(cp_parser_skip_to_closing_parenthesis_1): Deal with falling into
	a CPP_PRAGMA.
	(cp_parser_skip_to_end_of_{,block_or_}statement): Likewise.
	(cp_parser_skip_to_pragma_eol): Don't consume CPP_EOF.
	(cp_parser_new): Take a lexer, don't create it here.
	(cp_parser_declaration): Just point at peeked tokens, don't copy.
	(cp_parser_block_declaration): Likewise.
	(cp_parser_initial_pragma): Don't get the first token.
	(c_parse_file): Do it here, and finalize pch.