cmake: update vl4 module
cmake: update vl4 module

This patch updates the v4l-config.cmake module to make it correctly reflecting
the content provided by the libv4l package from [1].

[1] http://git.linuxtv.org/v4l-utils.git

Change-Id: Iab4bc336035dda5b431a56206842a848a60a9fa4
Reviewed-on: http://gerrit.aldebaran.lan/52169
Tested-by: gerrit
Reviewed-by: dmerejkowsky <1e4b13000fa8777df4cefd2fd8215187e3deb062@aldebaran-robotics.com>

dmerejkowsky/qibuild,dmerejkowsky/qibuild,aldebaran/qibuild,dmerejkowsky/qibuild,aldebaran/qibuild,dmerejkowsky/qibuild,aldebaran/qibuild,aldebaran/qibuild,dmerejkowsky/qibuild