Support 64bit addr_cache

-Doesn't work sometimes, have to investigate cause (probably bit 63..)
Fix mprotect call in make_writable
Add pause functionality in toolbar
Destroy EmuThread if termination fails

-Fixes "Quit" Action on Android
Change format of addr_cache for non-i386 platforms

-May resolve some issues with random mem_and_flags locations
Merge remote-tracking branch 'upstream/qt' into qt