Add kojih to bindings watchlist

Add kojih to bindings watchlist,
esp. since lotta churn due to porting IDL compiler to Python,
so wanna keep an eye on anything else going on.

Review URL: https://chromiumcodereview.appspot.com/19513002

git-svn-id: svn://svn.chromium.org/blink/trunk@154371 bbb929c8-8fbe-4397-9dbb-9b2b20218538