add time recording feature for ilator debugging

[LeeOHzzZ]

When -DILATOR_VERBOSE=ON is set during cmaking the generated sysmtec models, the execution time of each instructions will be recorded and dumped.

[LeeOHzzZ]

example:

[LeeOHzzZ]

Separate execution time profiling and instruction state update logging flags:
for cmaking ilator model:
-DILATOR_PROFILING=ON enables instruction logging and time profiling only
-DILATOR_VERBOSE=ON enables both time profiling and instruction state updates logging