configs/engicam_imx6qdl_icore_qt5_defconfig: needs udev to select glmark2

configs/engicam_imx6qdl_icore_qt5_defconfig: needs udev to select glmark2

The BR2_PACKAGE_GLMARK2 is lost while loading the defconfig with:
make engicam_imx6qdl_icore_qt5_defconfig

In order to select gmark2 package, BR2_PACKAGE_GLMARK2_FLAVOR_ANY option
must be set.

Based on the defconfig without X11 and wayland package, the only missing
option to select BR2_PACKAGE_GLMARK2_FLAVOR_ANY is BR2_PACKAGE_HAS_UDEV.
The only possible option is to enable one of the udev provider
(eudev or systemd). Select eudev package for /dev management.

Signed-off-by: Romain Naour <romain.naour@gmail.com>
Cc: Fabio Estevam <festevam@gmail.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>