* test/Makefile.am: New convenience library
	libdbus_testutils_la.  Reorder build so that
	test/ gets built before test/name-test so
	name-test files can depend on it.
	* test/name-test/test-shutdown.c: New file,
	exercises dbus_shutdown () a bit.
	* test/name-test/run-test.sh Run test-shutdown.
	* test/test-utils.h: In some cases we already have
	DBUS_COMPILATION defined, avoid double definition
	warning.