Use a direct include of strings headers in hunspell.

BUG=247723
TEST=none

Review URL: https://chromiumcodereview.appspot.com/16997003

git-svn-id: http://src.chromium.org/svn/trunk/deps/third_party/hunspell@206172 4ff67af0-8c30-449e-8e8b-ad334ec8d88c
3 files changed