Swith protobuf repository from Google Code to GitHub part2

This is a follow up CL for r357.

With this CL, Credit link to protobuf points GitHub page rather than Google Code.
This is just a document change.  No behavior change is intended.

BUG=none
TEST=unittest

git-svn-id: https://mozc.googlecode.com/svn/trunk@368 a6090854-d499-a067-5803-1114d4e51264
3 files changed
tree: a3b33d2a526d2b20669c00347b84e43c111dcd7f
  1. src/