On some machines, a hang has been noticed where the system sits in
the select call despite the task having completed.
The exact reasons for this as unknown but adding a timeout unblocked
the builds and resolved the hangs in question.
(Bitbake rev: 5223ffb5b6a46d8b3f6ac3362bd2672e2edf2691)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>