RFC: Disable asan tests under ulimit -v

[Mike Stump]

On Mar 23, 2018, at 11:52 AM, Jason Merrill <jason@redhat.com> wrote:
> 
> asan doesn't work under ulimit -v, which I want to use on shared hosts
> to avoid causing trouble with runaway processes.  There doesn't seem
> to be a way within expect to access getrlimit/setrlimit, so in this
> patch I call out to the shell to test the current limit, and give up
> if I get back a number (rather than "unlimited" or an error message).
> 
> Thoughts?

I'd punt to the asan folks.  Seems reasonable if it doesn't work.