Adding all mechanisms to handle block profiling. We currently profile all blocks that have mode than 20 instructions.  On the final design this information will be used to choose which one we optimize.
Adding all mechanisms to handle block profiling. We currently profile
all blocks that have mode than 20 instructions. 
On the final design this information will be used to choose which one we
optimize.

Current version has been tested and works almost correctly on jpeg.
Still note that it returns a coredump while deleting the vex simulator
because of corrupted double linked list...
srokicki/HybridDBT,srokicki/HybridDBT,srokicki/HybridDBT,srokicki/HybridDBT,srokicki/HybridDBT