ARM64 support [WIP]

Hey there, Christian Legnitto pointed me towards this project. AppBlade is currently using dwarfdump + maloader to achieve similar things on linux. I figured I'd jump in and start checking out out your guys projects and see how we can work together since we're working on a lot of similar stuff.

I've started working on getting ARM64 support into here since I noticed you guys are lacking that; however it appears that the version of libdwarf you suggested is segfaulting when it gets to that point. I'll be sorting that out but wanted to start a conversation around these changes.