Replacing shebang to make rpm/shell.req happy

--- ./src/password-store.sh
+++ ./src/password-store.sh
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/bin/bash
 
 # Copyright (C) 2012 - 2014 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
 # This file is licensed under the GPLv2+. Please see COPYING for more information.