[PR other/65021] mkoffloads -save-temps handling, and cleanup cleanup

[PR other/65021] mkoffloads -save-temps handling, and cleanup cleanup

	gcc/
	PR other/65021
	* config/i386/intelmic-mkoffload.c (mkoffload_atexit): Rename
	function to...
	(mkoffload_cleanup): ... this.  Adjust all users.
	(maybe_unlink): Look at save_temps and verbose flags instead of
	debug flag.
	(main): Parse "-save-temps" flag.
	(generate_target_descr_file, generate_target_offloadend_file)
	(generate_host_descr_file, prepare_target_image): Pass it on.
	* config/nvptx/mkoffload.c (tool_cleanup): Implement.
	(mkoffload_cleanup): New function.
	(maybe_unlink): Look at save_temps and verbose flags instead of
	debug flag.
	(main): Instead of calling utils_cleanup, register atexit handler
	for mkoffload_cleanup.
	(main): Parse "-save-temps" flag.
	(compile_native, main): Pass it on.
	* lto-wrapper.c (compile_offload_image): Likewise.

From-SVN: r228488