re PR c++/9154 (poor error message for ">>" vs. "> >" for nested template args)

re PR c++/9154 (poor error message for ">>" vs. "> >" for nested template args)

	PR c++/9154
	* parser.c (cp_parser_template_argument): A type-id followed by '>>'
	is just an user typo, and should be accepted as last resort if any
	other parsing fails.
	(cp_parser_enclosed_template_argument_list): If the argument list is
	parsed correctly, but the next token is '>>', emit a diagnostic.
	(cp_parser_next_token_ends_template_argument): Accept '>>' as
	delimiter of template argument, it will be later detected as a typo.

From-SVN: r74776