correct access right for git-svn-dcommit test

The tests requires anonymous write access. Therefore, "anon-access =
write" is added to conf/svnserve.conf. But because it was added to
the end of the file, it is impossible to guarantee in what section
it will be located. It turned out that on SVN 1.5, it was placed in
the wrong section and as result the test failed.

Signed-off-by: Dmitry Potapov <dpotapov@gmail.com>
Tested-by: Brad King <brad.king@kitware.com>
Acked-by: Eric Wong <normalperson@yhbt.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t9113-git-svn-dcommit-new-file.sh

@@ -28,6 +28,7 @@ start_svnserve () {
 
 test_expect_success 'start tracking an empty repo' '
 	svn mkdir -m "empty dir" "$svnrepo"/empty-dir &&
+	echo "[general]" > "$rawsvnrepo"/conf/svnserve.conf &&
 	echo anon-access = write >> "$rawsvnrepo"/conf/svnserve.conf &&
 	start_svnserve &&
 	git svn init svn://127.0.0.1:$SVNSERVE_PORT &&