generic: make function tables const where possible
generic: make function tables const where possible

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