xapp_xdriinfo: depends on the virtual package libgl

Fixes http://autobuild.buildroot.net/results/90a/90a8226a8a2978eb13d02645cb9e3d95d9b95757/



Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
[yann.morin.1998@free.fr: fix comment, trim the commit log from unneeded info]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>