Add support for x86 (Android)

[jsommr]

Sorry for all the issues, but I think GCanvas is an extremely important step towards better cross platform development.

I tried compiling GCanvas core and FreeType for Android x86 and got no errors. Have this architecture been left out because of subtle bugs? There might not be many Android devices out there running on x86, but the Android simulator usually does. I tried starting an arm-based simulator, which took approx. 30 minutes to boot and then crashed after trying to transfer some code for a long time.