fatcubin x86/x86-64 generation and loading.

* split CompiledKernel.getCubin() into getCubin32 and getCubin64 for x86/x86-64 bit architectures
* generate two files from cuda code, prefixed with -32 and -64, for x86 and x86-64 bit respectively

Conflicts:

	src/edu/syr/pcpratts/rootbeer/generate/opencl/tweaks/CudaTweaks.java