Change the way the configure script is executed and included in order

to make dependencies work.
Call the script pre-fetch and include Makefile.inc AFTER it has been
created.

Reported by:	Disturbed FreeBSD newbie who couldn't figure out
		why this didn't work as expected.

databases/postgresql80-server/Makefile

@@ -87,11 +87,7 @@ SCRIPTS_ENV=	WRKDIRPREFIX="${WRKDIRPREFIX}" \
 		NO_OPENSSL="${NO_OPENSSL}" \
 		DISTNAME="${DISTNAME}"
 
-.if exists(${WRKDIRPREFIX}${.CURDIR}/Makefile.inc)
-.include "${WRKDIRPREFIX}${.CURDIR}/Makefile.inc"
-.endif
-
-pre-extract:
+pre-fetch:
 	@ ${SETENV} ${SCRIPTS_ENV} ${SH} ${SCRIPTDIR}/configure.postgresql
 
 pre-install:
@@ -190,4 +186,8 @@ post-clean:
 
 post-extract: ${POSTEXTRACT}
 
+.if exists(${WRKDIRPREFIX}${.CURDIR}/Makefile.inc)
+.include "${WRKDIRPREFIX}${.CURDIR}/Makefile.inc"
+.endif
+
 .include <bsd.port.mk>