Add the minimal Tajik locale part 2 Add lang/tg.txt to get GetAvailableLocale not return Tajik. R=rouslan@chromium.org TBR=rouslan@chromium.org BUG=354658 TEST=See the bug. Review URL: https://codereview.chromium.org/211623002 git-svn-id: http://src.chromium.org/svn/trunk/deps/third_party/icu46@259309 4ff67af0-8c30-449e-8e8b-ad334ec8d88c