ukvm: Handle EFAULT from KVM_RUN, correct EINTR
ukvm: Handle EFAULT from KVM_RUN, correct EINTR

Prints a more useful message on EFAULT. Would be better to figure out
the faulting address but not sure if that is possible.

Corrects EINTR handling in main loop (just restart the call).

djwillia/solo5,Solo5/solo5,Weichen81/solo5,mato/solo5,mato/solo5,mato/solo5,Solo5/solo5,Weichen81/solo5,djwillia/solo5,Weichen81/solo5,djwillia/solo5