git-svn: fix test for trunk svn (commit message not needed)

The 'svn mv -m "rename to thunk"' was a local operation, therefore not
needing a commit message, it was silently ignored.  Newer svn clients will
instead raise an error.

Signed-off-by: Sam Vilain <sam.vilain@catalyst.net.nz>
Acked-by: Eric Wong <normalperson@yhbt.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t9104-git-svn-follow-parent.sh

@@ -19,8 +19,7 @@ test_expect_success 'initialize repo' "
 	poke trunk/readme &&
 	svn commit -m 'another commit' &&
 	svn up &&
-	svn mv -m 'rename to thunk' trunk thunk &&
-	svn up &&
+	svn mv trunk thunk &&
 	echo goodbye >> thunk/readme &&
 	poke thunk/readme &&
 	svn commit -m 'bye now' &&