Refine the assertion in vm_object_clear_flag() to allow operation on the kmem_object without Giant.  In that case, assert that the kmem_object's mutex is held.
Refine the assertion in vm_object_clear_flag() to allow operation on the
kmem_object without Giant.  In that case, assert that the kmem_object's
mutex is held.

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