package/opencv3: add webp support

webp support is available since version 3.0.0 and
https://github.com/opencv/opencv/commit/500b7318beee639d8c341e9ea63ac7610ca225f4

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
2 files changed