LuaJIT on iOS

Someone created a fork, which essentially adds a script to build LuaJIT for the several architectures needed by iOS, then combines them using lipo: github.com/cailei/luajit.

I updated the script by taking the latest SDK versions and removing the reference to gcc inside the Xcode bundle:

The script works seamlessly with LuaJIT 2.0.4.

Unfortunately, LuaJIT does not support the arm64 architecture yet.