bitkeeper revision 1.1236.1.16 (421db67dL0mXatHebAtt9KpMqkCIBQ)
bitkeeper revision 1.1236.1.16 (421db67dL0mXatHebAtt9KpMqkCIBQ)

More FPU fixes. Extend taskswitch hypercall to allow TS bit to be
cleared as well as set.


rowhit/xen-minios,rowhit/xen-minios,rowhit/xen-minios