Make xmlcatmgr/catalogs.mk tool-depend on xmlcatmgr.  XXX WRONG!

This is a provisional kludge which doesn't really work.  Need to find
the right solution.

Index: textproc/xmlcatmgr/catalogs.mk
===================================================================
RCS file: /cvsroot/pkgsrc/textproc/xmlcatmgr/catalogs.mk,v
retrieving revision 1.19
diff -p -u -r1.19 catalogs.mk
--- textproc/xmlcatmgr/catalogs.mk	14 Jun 2009 22:58:09 -0000	1.19
+++ textproc/xmlcatmgr/catalogs.mk	23 Apr 2013 13:29:22 -0000
@@ -59,6 +59,7 @@ DEINSTALL_TEMPLATES+=	../../textproc/xml
 PRINT_PLIST_AWK+=	/^share\/(sgml|xml)\/catalog$$/ \
 				{ print "@comment in xmlcatmgr: " $$0; next; }
 
+BUILDLINK_DEPMETHOD.xmlcatmgr?=		tool
 .include "../../textproc/xmlcatmgr/buildlink3.mk"
 
 .endif	# XMLCATMGR_CATALOGS_MK