[master] forgot CLEANFILES entry in merge of #963

this should fix the distcheck failure reported in http://git.bind10.isc.org/~tester/builder/BIND10-distcheck/20120327113000-FreeBSD8-i386/logs/distcheck.out

src/lib/python/isc/log_messages/Makefile.am

@@ -30,6 +30,7 @@ CLEANFILES += config_messages.pyc
 CLEANFILES += notify_out_messages.pyc
 CLEANFILES += libxfrin_messages.pyc
 CLEANFILES += server_common_messages.pyc
+CLEANFILES += dbutil_messages.pyc
 
 CLEANDIRS = __pycache__