fix shellcheck error of SC2148

Author: sasurau4

compiler/rustc_codegen_cranelift/scripts/config.sh

@@ -1,3 +1,4 @@
+#!/usr/bin/env bash
 set -e
 
 unamestr=`uname`

src/ci/docker/host-x86_64/dist-powerpc64-linux/shared.sh

@@ -1,3 +1,4 @@
+#!/bin/sh
 hide_output() {
   set +x
   on_err="

src/ci/docker/host-x86_64/dist-powerpc64le-linux/shared.sh

@@ -1,3 +1,4 @@
+#!/bin/sh
 hide_output() {
   set +x
   on_err="

src/ci/docker/host-x86_64/dist-riscv64-linux/crosstool-ng.sh

@@ -1,3 +1,4 @@
+#!/bin/sh
 set -ex
 
 # Mirrored from https://github.com/crosstool-ng/crosstool-ng/archive/crosstool-ng-1.24.0.tar.gz

src/ci/docker/host-x86_64/dist-various-1/install-mips-musl.sh

@@ -1,3 +1,4 @@
+#!/bin/sh
 set -ex
 
 mkdir /usr/local/mips-linux-musl

src/ci/docker/host-x86_64/dist-various-1/install-mipsel-musl.sh

@@ -1,3 +1,4 @@
+#!/bin/sh
 set -ex
 
 mkdir /usr/local/mipsel-linux-musl

src/ci/docker/host-x86_64/dist-various-2/shared.sh

@@ -1,3 +1,4 @@
+#!/usr/bin/env bash
 hide_output() {
   { set +x; } 2>/dev/null
   on_err="

src/ci/docker/host-x86_64/dist-x86_64-linux/shared.sh

@@ -1,3 +1,4 @@
+#!/bin/sh
 hide_output() {
   set +x
   on_err="

src/ci/docker/scripts/android-base-apt-get.sh

@@ -1,3 +1,4 @@
+#!/bin/sh
 set -ex
 
 apt-get update

src/ci/docker/scripts/android-ndk.sh

@@ -1,3 +1,4 @@
+#!/bin/sh
 set -ex
 
 URL=https://dl.google.com/android/repository