Log Message:
-----------
Unbreak doc/src/sgml maintainer-clean rule on VPATH builds.
Modified Files:
--------------
pgsql/doc/src/sgml:
Makefile (r1.130 -> r1.131)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/Makefile?r1=1.130&r2=1.131)