nanomsg: Handle EINTR on nn_recv and nn_msg.
nanomsg: Handle EINTR on nn_recv and nn_msg.

Fixes #171.

am11/Criterion,offa/Criterion,a1lu/Criterion,am11/Criterion,offa/Criterion,Snaipe/Criterion,offa/Criterion,am11/Criterion,a1lu/Criterion,Snaipe/Criterion,a1lu/Criterion,a1lu/Criterion,Snaipe/Criterion,am11/Criterion,a1lu/Criterion,Snaipe/Criterion,offa/Criterion,offa/Criterion,am11/Criterion,Snaipe/Criterion