core: switch bash shell scripts to use /bin/sh for use w/Busybox.

Fixes https://gitlab.freedesktop.org/mobile-broadband/ModemManager/-/issues/483

data/fcc-unlock/105b

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 # SPDX-License-Identifier: CC0-1.0
 # 2021 Aleksander Morgado <aleksander@aleksander.es>

data/fcc-unlock/1199

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 # SPDX-License-Identifier: CC0-1.0
 # 2021 Aleksander Morgado <aleksander@aleksander.es>

data/fcc-unlock/1eac

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 # SPDX-License-Identifier: CC0-1.0
 # 2021 Aleksander Morgado <aleksander@aleksander.es>

test/mmcli-test-sms

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 print_usage () {
     echo "usage: $0 [MODEM INDEX] [all|ucs2|gsm7|data] [NUMBER]"

tools/tests/test-wrapper.sh.in

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 # For debugging behavior of test-modemmanager-service.py, you can modify
 # this line to add --log-file option