Build mkdfiff only if PNG support is enabled.
Build mkdfiff only if PNG support is enabled.

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