re PR testsuite/21164 (libjava tests uses absolute paths)

re PR testsuite/21164 (libjava tests uses absolute paths)

	libjava:
	PR testsuite/21164
	* testsuite/lib/libjava.exp: Load dg.exp.
	* testsuite/libjava.jar/jar.exp (gcj_jar_interpret): Strip srcdir
	from jarfile.
	Use result for messages.
	* testsuite/libjava.loader/loader.exp (gcj_loader_test_one): Pass
	errname to libjava_invoke, fix testname.

	gcc:
	PR testsuite/21164
	* lib/compat.exp (compat-execute): Declare unsupported after
	stripping path from src1.
	* lib/lto.exp (lto-execute): Likewise.

From-SVN: r172302