Build process does not create include an x86_64 version of the library in the framework

[bradtheappguy]

Currently the final framework generated by make.py creates a fat static library with armv7,armv7s, arm64, and i386 (simulator).

It would be nice to have x86_64 added for use in the 64 bit iPhone Simulator.

[phoboslab]

Fixed in https://github.com/phoboslab/JavaScriptCore-iOS/commit/8d6d8d81e999c6e08f274d1d1521eb91ce233b4c