Add a method to save the gpr/fpr state in jit.
Make it possible to have more block exits.
Clean up some inconsistency in jit branches.
Attempt at doing branches with imm args.
Attempt to follow branches to a max # of ops.

Seems to make it slower also.  Maybe taking the branch would be better...
hmmph.
Clean up some inconsistency in jit branches on arm.
Merge pull request #3189 from unknownbrackets/jit-branch

Attempts at continuing jit blocks (disabled)