Add proper shebangs using env

build.sh

@@ -1,4 +1,5 @@
-#!/bin/sh
+#!/usr/bin/env sh
+
 # Build a package with $1 variant
 #
 # Copyright 2018-2020 FriendlyNeighborhoodShane

src/META-INF/com/google/android/update-binary

@@ -1,4 +1,5 @@
 #!/sbin/sh
+
 # Minimal MicroG installer
 # By FriendlyNeighborhoodShane
 # Based on work by osm0sis @ xda-developers (Thanks!)

update.sh

@@ -1,4 +1,5 @@
-#!/bin/sh
+#!/usr/bin/env sh
+
 # Update all assets
 #
 # Copyright 2018-2020 FriendlyNeighborhoodShane