Merge pull request #1 from fitzgen/tidy-scripts

A couple little commits to tidy up the scripts a tiny bit

Author: tschneidereit

build-engine.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -ex
 
 if [[ ! -a gecko-dev ]]

download-engine.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -e
 
 script_dir="$( cd "$( dirname "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )"