protobuf-c: import from packages, bump version.

Signed-off-by: Jacob Siverskog <jacob@teenageengineering.com>
protobuf-c: Add myself as maintainer.

Signed-off-by: Jacob Siverskog <jacob@teenageengineering.com>
Merge branch 'master' of git://github.com/openwrt/packages
Merge pull request #92 from jsiverskog/master

protobuf-c: import from packages, bump version.