core: Add CORE_X11VDPAU to system type enum.
core: Add CORE_X11VDPAU to system type enum.

deniskropp/DirectFB,mtsekm/test,sklnet/DirectFB,deniskropp/DirectFB,dfbdok/DirectFB1,kevleyski/directfb,kaostao/directfb,djbclark/directfb-core-DirectFB,kevleyski/directfb,kaostao/directfb,kevleyski/DirectFB-1,DirectFB/directfb,kevleyski/DirectFB-1,lancebaiyouview/DirectFB,Distrotech/DirectFB,sklnet/DirectFB,kevleyski/directfb,jcdubois/DirectFB,Distrotech/DirectFB,djbclark/directfb-core-DirectFB,mtsekm/test,sklnet/DirectFB,lancebaiyouview/DirectFB,mtsekm/test,deniskropp/DirectFB,DirectFB/directfb,deniskropp/DirectFB,jcdubois/DirectFB,sklnet/DirectFB,lancebaiyouview/DirectFB,kaostao/directfb,kevleyski/DirectFB-1,djbclark/directfb-core-DirectFB,DirectFB/directfb,dfbdok/DirectFB1,djbclark/directfb-core-DirectFB,Distrotech/DirectFB,kevleyski/directfb,jcdubois/DirectFB,lancebaiyouview/DirectFB,kevleyski/DirectFB-1,dfbdok/DirectFB1