Windows: osi_mutex / osi_rwlock changes

Windows: osi_mutex / osi_rwlock changes

Reorganize the osi_mutex and osi_rwlock structure so
that all counters are 32-bit and pointers are
aligned.  This requires adding padding fields.

Move lock validation checks within the critical section.

Include additional assertions checking the ownership
state and protecting against under/overflows.

Increase the size of the rwlock tid array to support
a larger number of simultaneous readers.

Change-Id: Ia46684c601a1a589a210a36862ae6ad6448a435e
Reviewed-on: http://gerrit.openafs.org/6130
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Tested-by: Jeffrey Altman <jaltman@secure-endpoints.com>
Reviewed-by: Jeffrey Altman <jaltman@secure-endpoints.com>