[openwrt/openwrt] scripts/mkits.sh: switch from bash to sh

[LEDE Commits]

ynezz pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/3d418dd51ed217317fd5c4815cd1919ba1875dfb

commit 3d418dd51ed217317fd5c4815cd1919ba1875dfb
Author: Rosen Penev <rosenp at gmail.com>
AuthorDate: Sun Jan 5 18:31:20 2020 -0800

    scripts/mkits.sh: switch from bash to sh
    
    This no longer needs bash.
    
    Signed-off-by: Rosen Penev <rosenp at gmail.com>
---
 scripts/mkits.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/mkits.sh b/scripts/mkits.sh
index c09e537dbd..62cfc21c6b 100755
--- a/scripts/mkits.sh
+++ b/scripts/mkits.sh
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/bin/sh
 #
 # Licensed under the terms of the GNU GPL License version 2 or later.
 #