Updated shabang for dependency installation scripts.

wine/install-dependencies-arch.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # Immediately exit if errors are encountered.
 set -e

wine/install-dependencies-debian.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # Immediately exit if errors are encountered.
 set -e