direct: Add direct_thread_sleep().
direct: Add direct_thread_sleep().

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