build: fix build of generated core files by specifying explicit rules
build: fix build of generated core files by specifying explicit rules

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