cmake: fix freetype imageprovider
cmake: fix freetype imageprovider

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