pkgsel.d/PostgreSQL.ask: add libevent because pgbouncer depends on it

pkgsel.d/PostgreSQL.ask

@@ -2,7 +2,7 @@
 # This copyright note is auto-generated by ./scripts/Create-CopyPatch.
 #
 # Filename: target/ecn-node/pkgsel.d/PostgreSQL.ask
-# Copyright (C) 2012 The OpenSDE Project
+# Copyright (C) 2012 - 2013 The OpenSDE Project
 #
 # More information can be found in the files COPYING and README.
 #
@@ -18,3 +18,6 @@ X libaio
 X recode
 X synbak
 X repmgr
+
+# needed by pgbouncer
+X libevent