This cleans up some of the code between core and UI for disassembling and dumping code blocks.
Should help the QT UI in bringing up its debug UI since it won't have to deal with this garbage now.

There are a couple things in this PR.
Fixes a bug where if we hit an invalid instruction we would infinite loop.
Fixes an issue where on AArch64 it would show invalid instructions for all NEON instructions.
This was due to asimd and crc being optional extensions and LLVM not enabling them by default.
So we have to specify a CPU which has the feature. LLVM 3.6 will let us select by features instead of CPUs, but we don't have a release of that quite
yet.

If we are on an architecture that has a known instruction size, we will continue onward after hitting the invalid instruction. If we don't have a
known instruction size like on x86, we will instead just dump the rest of the block.

Moves things over to Bind.

This will work for all of our platforms, x86, ARMv7, and AArch64.
Main issue with this is that LLVM's cmake files aren't correctly finding the LLVM install.
Not sure if this is Ubuntu's issue or not, it may just work on other operating systems.

We could potentially improve this, you can pass in a specific CPU in to the LLVM disassembler. This would probably affect latency times that are
reported by LLVM's disassembly? This needs to be further investigated later.

This code was an absolute mess. It had allocated an arbitrarily large string buffer to hold instructions that were disassembled.

Strip out all of the nasty raw C string manipulation and replaces it with ostringstream usage.
Fixes an issue where if you didn't have a JIT recompiler running then Dolphin would instantly crash if you tried comparing PPC to x86 code.
Changed the disassembly of the host side code from being inline to the function to instead being in a class, this will be required when I add support
for ARMv7 and AArch64 to this window.