Add the mutex profiling lock to the witness list.  This hopefully unbreaks the MUTEX_PROFILING + WITNESS + !WITNESS_SKIPSPIN case.
Add the mutex profiling lock to the witness list.  This hopefully unbreaks
the MUTEX_PROFILING + WITNESS + !WITNESS_SKIPSPIN case.

Submitted by:	Hiten Pandya <hiten@uk.FreeBSD.org>

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase