Don't copy the Linux src tree if --linux-dir is not within ARC_GNU

2013-03-15  Vineet Gupta <vgupta@synopsys.com>

	* build-uclibc.sh: No need to copy Linux sources

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>

Conflicts (from cherry-pick, resolved):
	ChangeLog
	build-uclibc.sh
Allow a defconfig based build if that exists in uClibc

2013-03-15  Vineet Gupta <vgupta@synopsys.com>

	* build-uclibc.sh: Allow a defconfig based uClibc build

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2013-03-18  Jeremy Bennett <jeremy.bennett@embecosm.com>

	* build-all.sh: Add --big-endian to help.