Merge pull request #4333 from jmillikin/update-file-lists-needs-bash

`update_file_lists.sh` depends on Bash features, thus needs Bash sebang.

update_file_lists.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 # This script copies source file lists from src/Makefile.am to cmake files.