All test scripts should end with test_done, which reports the test
results. In the future, it could be used for other purposes, e.g. to
distinguish graceful end from "exit" in a test. This patch fixes
scripts that don't call test_done.
Signed-off-by: Pavel Roskin <proski@gnu.org> Signed-off-by: Junio C Hamano <junkio@cox.net>