Allow use of different boards. Fix issues with site.exp.

2013-02-04  Jeremy Bennett <jeremy.bennett@embecosm.com>

	* arc-init.sh (run_check): Add board as fourth argument.
	(save_res): Only run if there is a result file, and put all
	results to log.
	* dejagnu/baseboards/arc-linux-generic.exp: Take the
	target_install data from ${target_triplet}.
	* dejagnu/baseboards/arc-sim-base.exp: Likewise.
	* run-elf32-tests.sh: Add board when running tests.
	* run-tests.sh (ARC_TEST_TARGET): Correct typo in default value
	* run-uclibc-tests.sh: Add board when running tests
	* site.exp: Only set target_list if not already set. Error if not
	a recognized ARC triplet.