cpp.texi: Update.

cpp.texi: Update.

        * cpp.texi: Update.
        * cppexp.c (parse_number): Update.
        * cpplex.c (parse_string): Pedwarn if multiline string does not
        result from a system header's macro.
        * cpplib.h (sys_objmacro_p): Rename sys_macro_p.
        * cppmacro.c (sys_objmacro_p): Rename sys_macro_p.  Return true
        for function-like macros too.
	* c-lex.c (parse_number): Update.

From-SVN: r40211