c-lex.c (parse_float, yylex): For -Wtraditional, issue a warning about non-traditional numeric constant suffixes.

	* c-lex.c (parse_float, yylex): For -Wtraditional, issue a
	warning about non-traditional numeric constant suffixes.

	* cppexp.c (parse_number): Likewise.

	* invoke.texi: (-Wtraditional): Document new behavior.

From-SVN: r35607