Count API module instantiations and Hook runs

Count API module instantiations and Hook runs

We previously had counts for hooks and modules as a side-effect of having them
profiled. We removed the profiling for performance reasons, which left us
without counts also. But the performance of counters is not a concern, and
their signal value not insubstantial. So introduce them here.

Fix getModulePath() to not crash while we're at it.

Change-Id: Ic04daf475b936b942833362c7a979dde671b3ef4