As EGL is not a 'public dependency' of Qt, it is ok for it not
to be available where Qt is deployed.

Change-Id: I02dcc5f72ca4437210cff10e8b557e216f3e0419
Reviewed-by: Johannes Lochmann <johannes.lochmann@gmail.com>
Reviewed-by: Stephen Kelly <stephen.kelly@kdab.com>