Bring Hunspell google.patch up to date

A few changes in our version of Hunspell have been made without updating
google.patch file. This CL brings google.patch file up to date and documents in
README.chromium how to get the base version of Hunspell that we are using.


Review URL:

git-svn-id: 4ff67af0-8c30-449e-8e8b-ad334ec8d88c
2 files changed