FYI: Increase in schedlock.exp failures in LinuxThreads on an RH kernel

[Roland McGrath]

> Have you run a testsuite using LinuxThreads, but the NPTL-aware kernel? 
> That should be enough to trigger it, I think.  It won't show up in
> NPTL, because the SIGINT will be load balanced and only delivered to
> one of the threads.

We certainly have in the past, and if it's not part of our regular testing
regime then we should make sure that it becomes one.  I'll have to check.