package/opencv3: bump to version 3.4.12

- Drop patches (already in version)
- Update LICENSE hash, update in year:
  https://github.com/opencv/opencv/commit/039f5ca42e32dd11605d81e909c3bdad16c4cdbc
- Update indentation in hash file (two spaces)

https://github.com/opencv/opencv/wiki/ChangeLog#version3412

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