Provide multilib support when testing.

2013-04-03  Jeremy Bennett <jeremy.bennett@embecosm.com>

	* run-tests.sh: Add --multilib-options and --little-endian
	* run-elf32-tests.sh, run-uclibc-tests.sh: Add comment regarding
	the ARC_MULTILIB_OPTIONS environment variable.
Create README for each test with details of the test. Fix a glitch in the AA4
board spec.

2013-04-03  Jeremy Bennett <jeremy.bennett@embecosm.com>

	* run-elf32-tests.sh, run-uclibc-tests.sh: Create README in the
	results directory with details of the test run.
	* dejagnu/baseboards/arc-linux-aa4.exp: Correct env variable
	specifying target IP address to ARC_TEST_ADDR_UCLIBC.