vm: Log if we hit the timeout
vm: Log if we hit the timeout

Turns out it's really useful to know when we are hitting timeouts when
debugging!

Updates: https://github.com/clearcontainers/proxy/issues/37

Signed-off-by: Damien Lespiau <64bd3cb94f359c1a3ce68dae5e26b40578526277@intel.com>

clearcontainers/proxy,clearcontainers/proxy