*/*: Bump all devel/protobuf consumers

They must always be bumped after devel/protobuf because it include
following files whose filenames contain %%PORTVERSION%%. Consequently,
the shlib will always change when PORTVERSION is increased.

lib/libprotobuf-lite.so.%%PORTVERSION%%.0
lib/libprotobuf.so.%%PORTVERSION%%.0
lib/libprotoc.so.%%PORTVERSION%%.0

Approved by: portmgr (blanket; fixing consumers)