The tests where supposed to be run through make check, not running the
"run-test.sh" standalone. So revert that patch to have make check work
as intended.
This reverts commit 6983eebf47f37def8f2315d5af1800b81644f240.
Currently test/run-test.sh cannot get the value of ${srcdir} and
${top_builddir}. Thus we cannot run any test case. This patch uses
$0 to get the absolute path of run-test.sh. Now test cases work.