qi::os::timeval: use long long instead of long

the size depends on the platform. so fix it to long long.

Change-Id: Ic284a89e6f144d1dd5c3a08d69fe2917ca17a3a4
Reviewed-on: http://gerrit.aldebaran.lan:8080/13228
Tested-by: gerrit
Reviewed-by: cgestes <gestes@aldebaran-robotics.com>
Tested-by: cgestes <gestes@aldebaran-robotics.com>
Future: Prevent cast to bool of Future<void>.

Change-Id: I2b8ed70acaff459e3c451699ba26e4d69ead007d
Reviewed-on: http://gerrit.aldebaran.lan:8080/13782
Reviewed-by: cgestes <gestes@aldebaran-robotics.com>
Tested-by: gerrit