chore(scripts): ensure get scripts fail when errors

Signed-off-by: Cryptophobia <aouzounov@gmail.com>

Author: Cryptophobia

rootfs/bin/get_src

@@ -1,4 +1,5 @@
-#!/usr/bin/env bash
+#!/bin/sh
+set -e
 
 hash="$1"
 url="$2"

rootfs/bin/get_src_file

@@ -1,4 +1,5 @@
-#!/usr/bin/env bash
+#!/bin/sh
+set -e
 
 hash="$1"
 url="$2"

rootfs/bin/get_src_gpg

@@ -1,4 +1,5 @@
-#!/usr/bin/env bash
+#!/bin/sh
+set -e
 
 key="$1"
 url="$2"