Start removing select Linux-isms

bash might not be in /bin. Don't expect it there.

Keyboards/infinity.bash

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # This is a build script template
 # These build scripts are just a convenience for configuring your keyboard (less daunting than CMake)
 # Jacob Alexander 2015