Fix after repository-copy.
All XEmacs(version 21) ports has been merged and its' mule ports were
ported. Here is the mule meta ports of editors/xemacs21 which has been
committed so as to work with mule ports by Michael Elbel (me@FreeBSD.org).
PR: ports/15762
Submitted by: KIRIYAMA Kazuhiko <kiri@pis.toba-cmt.ac.jp>