buildroot

python/web2py: bump to version 2.12.3 - hash file

This patch bumps web2py to the latest released version (2.12.3)
and adds hash file.

Signed-off-by: Angelo Compagnucci <angelo.compagnucci@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>