BUILD: scripts: automatically update the branch in version.h when releasing

The stats page proudly displays "Updates (v1.5)". This version is inherited
from version.h which has not been updated since 1.5, so let's teach the
create-release script about it.

This must be backported to 1.7. 1.6 now uses the same script (externally)
for the release and will automatically benefit from it.
1 file changed