main/postgresql: upgrade to 9.0.5

fixes #781

main/postgresql/APKBUILD

 # Maintainer: Natanael Copa <ncopa@alpinelinux.org>
 pkgname=postgresql
-pkgver=9.0.1
+pkgver=9.0.5
 pkgrel=0
 pkgdesc="A sophisticated object-relational DBMS"
 url="http://www.postgresql.org/"
@@ -56,7 +56,7 @@ client() {
 }
 
 
-md5sums="57ba57e43cfe29e16dacbf5789be98d1  postgresql-9.0.1.tar.bz2
+md5sums="86816eb8a8513532957b96045abdfef9  postgresql-9.0.5.tar.bz2
 66c197b8186a6df0752fe2aed40c90c4  postgresql.initd
 c56a4db0c3757f5dc7f9d59132b428ba  postgresql.confd
 7f8de63848c51c8a30c39bec6b1b1606  pg-restore.initd