Rename libnanopb-c to follow other protobuf libraries.

- Remove version code from the library name. The version code used to
  cause big trouble when we upgraded external/protobuf to a new version.
- Rename them to follow libprotobuf-<lang>-<type> pattern in
  external/protobuf.

Bug: 20093047
Change-Id: I4f20a1df239d997fee52175b2c719194b0168eef
1 file changed