Add luajit libraries to Android ndk build
Add LuaJIT to make-host and libmoai build

Add compilation, argument checking, etc for luajit in the make-host and
libmoai build.
Update varargs in init.lua to accomodate differences with LuaJIT
Run the libluajit target only to prevent errors when building the unused executable
Merge pull request #784 from JandyCo/android-luajit

Add LuaJIT Support to Android Host