Update build-depends
Update build-depends

The commands unzip and jar are needed for unittests; as such, add
dependency on unzip, and move the openjdk package from
build-depends-indep to build-depends, in order for it to be available
during all builds.

proppy/protobuf-debian,proppy/protobuf-debian,proppy/protobuf-debian,proppy/protobuf-debian,proppy/protobuf-debian