Teach recent changes in the umtx structure in the kernel to the libthr initialiazer.
Teach recent changes in the umtx structure in the kernel to the libthr
initialiazer.

Found by:	tinderbox

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