fix findLib to search also in bin/ for windows

Change-Id: Ib145e8e45a0ae98f10d2a2d4c858d3afa70608bd
Reviewed-on: http://gerrit.aldebaran.lan/21214
Reviewed-by: rchevalier <rchevalier@aldebaran-robotics.com>
Tested-by: gerrit
Reviewed-by: cgestes <gestes@aldebaran-robotics.com>