Patch 'lib: sync function return remaining time to timeout'
change a bit the API, now the sync function return the
remaining timeout. The WRTD library was not thought with this
in mind. To preserve the previous behavior we ignore the
timeout "error".
Signed-off-by: Federico Vaga <federico.vaga@cern.ch>


NOTE
This commit has been created by `git subtree` on the Mock Turtle repository
on tag mock-turtle-2.0

This commit will not compile