cppfiles.c (cpp_rename_file, [...]): New.

	* cppfiles.c (cpp_rename_file, cpp_push_include): New.
	* cppinit.c (push_include): Move with changes to cppfiles.c.
	(cpp_read_main_file): Mark named operators here...
	(cpp_finish_options): ...not here.  Update.
	(_cpp_maybe_push_include_file): Update.
	* cpplib.h (cpp_push_include, cpp_rename_file): New.

From-SVN: r64266