package/openjpeg: fix CVE-2020-6851

OpenJPEG through 2.3.1 has a heap-based buffer overflow in
opj_t1_clbl_decode_processor in openjp2/t1.c because of lack of
opj_j2k_update_image_dimensions validation.

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