elf: Rename EM_INTEL205 to EM_INTELGT

Rename EM_INTEL205 to EM_INTELGT for Intel Graphics Technology.

binutils/

	* readelf.c (get_machine_name): Add EM_INTELGT.

include/

	* elf/common.h (EM_INTEL205): Renamed to ...
	(EM_INTELGT): This.