um: Report host OOM more nicely
um: Report host OOM more nicely

If UML runs on the host side out of memory, report this
condition more nicely.

Signed-off-by: Richard Weinberger <320bca71fc381a4a025636043ca86e734e31cf8b@nod.at>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs