BuildSystem: all scripts have now bash shebang

I could not use the scripts on debian

bochs.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 set -e
  
 BOCHS_CONFIG_FILE=bochsrc

image-full.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 set -e
 
 DISK_SIZE=$[50 * 1024 * 1024]

image.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 set -e
 
 if [ ! -f $DISK_IMAGE_PATH ]; then

install-usb.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 set -e
 
 SIZE=$(stat -c '%s' banan-os.img | numfmt --to=iec)

linecount.sh

@@ -1,3 +1,3 @@
-#!/bin/sh
+#!/bin/bash
 
 find . | grep -vE '(build|toolchain)' | grep -E '\.(cpp|h|S)$' | xargs wc -l | sort -n

qemu.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 set -e
  
 qemu-system-$BANAN_ARCH										\

toolchain/build.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 set -e
 
 BINUTILS_VERSION="binutils-2.39"

userspace/create_program.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 set -e