Use NEON for unswizzling, minor tweak to texcache

Not using aligned loads in unswizzling because I'm not sure it's worth handwriting and I don't know how to specify it with the intrinsics.

But, now using aligned loads in QuickTexHashNEON.  Unfortunately my tests are showing it's the same speed but it may help some devices/games more than others.  Possibly the writeback is causing a penalty maybe..

It's really hard to get anything useful performance wise on Android it seems like.  Everything varies so much by run, and my FPS dances up and down and is never stable (I have power saving on so I can get < 100% speed and not deal with the impact of frameskip.)  But it seems like this is averaging faster per profile and fps.

-[Unknown]