Moved away from using lazy_static for this one since every access to a
lazy_static reference adds a runtime check, Currently using a build.rs script to generate a const table instead.
Worked out the ARM decoding issues, seems to run fine now.
Though the dynamic decoding for ARM is broken now since I had to change things in Data Processing and MSR instructions
TODO use `const fn` when it becomes stable
Former-commit-id: ba09748ff74a403c7016adcbe0ca553b591f6855
