Update to use latest uClibc and Linux. This breaks gdbserver, so for now its
building is disabled.

2013-03-27  Jeremy Bennett <jeremy.bennett@embecosm.com>

	* arc-versions.sh: Updated for arc-uclibc-mainline branch of
	uClibc and arc-3.8-ABI-v3 for Linux.
	* build-uclibc.sh: No need for -DARC_LEGACY_PTRACE_ABI with
	gdbserver. Temporarily disable building gdbserver while fixing
	header problems.
Merge branch 'arc_4_8-toolchain-dev' of github.com:foss-for-synopsys-dwc-arc-processors/toolchain into arc_4_8-toolchain-dev