fix bash path

--- scripts/rfs-pkg-config.orig	Thu Apr  8 11:12:19 2010
+++ scripts/rfs-pkg-config	Thu Apr  8 11:12:34 2010
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!${LOCALBASE}/bin/bash
 
 # Tt runs pkg-config in a way that everything is searched under RFS
 # but reported including full path. Suitable for cross-compiling