protobuf-c: import from packages, bump version.

Signed-off-by: Jacob Siverskog <jacob@teenageengineering.com>
Merge branch 'master' of github.com:jsiverskog/openwrt-packages
Revert "protobuf-c: import from packages, bump version."

This reverts commit 1fa4f46fec23b3a23d95c7bbd60d45d9e48dd697.
protobuf-c: import from packages, bump version.

Signed-off-by: Jacob Siverskog <jacob@teenageengineering.com>