Here is a resubmission of the libgcc patch, removing the dependence on a header
(arch/atomic.h) that's not installed by linux.

Walter

	* config.host: Handle tilegx and tilepro.
	* config/tilegx/sfp-machine.h: New file.
	* config/tilegx/sfp-machine32.h: New file.
	* config/tilegx/sfp-machine64.h: New file.
	* config/tilegx/t-softfp: New file.
	* config/tilegx/t-tilegx: New file.
	* config/tilepro/atomic.c: New file.
	* config/tilepro/atomic.h: New file.
	* config/tilepro/sfp-machine.h: New file.
	* config/tilepro/softdivide.c: New file.
	* config/tilepro/softmpy.S: New file.
	* config/tilepro/t-tilepro: New file.