Partial merge from the arc_4_4-toolchain-dev branch. Some of the changes are
relevant to all GDB releases, not just 6.8.

Changes to get GDB 6.8 regression testing to work with gdbserver (not yet
successfully)

2013-02-21  Jeremy Bennett <jeremy.bennett@embecosm.com>

	* dejagnu/baseboards/arc-linux-generic.exp: Move extra file loads
	to after the main config file is loaded. Add gdb-extra.exp. Mark
	as using GDB stub.
	* dejagnu/gdb-extra.exp: Created as placeholder.