fix shebang

build-ff.sh

@@ -1,4 +1,4 @@
-#!/usr/bin/bash
+#!/bin/bash
 PWD=$(pwd)
 BASE_DIR=${PWD}/base
 MANIFEST_DIR=${PWD}/firefox
@@ -12,4 +12,4 @@ rm -f ${OUT}
 cd "$BASE_DIR" || return
 zip -r ${OUT} *
 cd "${MANIFEST_DIR}" || return
-zip -r ${OUT} manifest.json
+zip -r ${OUT} manifest.json