* config/powerpc/spu-linux.mh: New file.

	* config/powerpc/spu-linux.mh: New file.
	* config/spu/spu.mt: New file.
	* configure.ac: Provide gdb_native configuration variable.
	* configure: Regenerate.
	* configure.host: Support powerpc64 to spu 'pseudo-native' mode.
	* configure.tgt: Add "spu" target_cpu and "spu*-*-*" target.
	* Makefile.in (spu_tdep_h): New variable.
	(ALLDEPFILES): Add spu-linux-nat.c and spu-tdep.c
	(spu-linux-nat.o, spu-tdep.o): Add dependencies.
	* spu-linux-nat.c: New file.
	* spu-tdep.c: New file.
	* spu-tdep.h: New file.