Remove unneeded files for arc-elf32-gdb and updated configuration accordingly.

i2013-01-31  Jeremy Bennett <jeremy.bennett@embecosm.com>

	* arc-gpio.c, arc-gpio.h, arc-jtag-actionpoints.c: Deleted.
	* arc-jtag-actionpoints.h, arc-jtag-fileio.c: Likewise.
	* arc-jtag-fileio.h, arc-jtag-ops.c, arc-jtag-ops.h: Likewise.
	* arc-jtag.c, arc-jtag.h, arc-support.h: Likewise.
	* arc-elf-tdep.c: Renamed from arc-jtag-tdep.c.
	* arc-elf-tdep.h: Renamed from arc-jtag-tdep.h.
	* configure.tgt <arc*-*-*>: Remove redundant files from target.