Disable shortStandaloneMonth test in Russian

ICU/CLDR has changed short stand-alone month names in Russian locale.

With ICU update, these tests will fail. Disable them temporarily
and enable them again once the ICU update is completed.

To make enabling easy, also update the expected result in this CL.

BUG=377042
TEST=webkit_unit_tests --gtest_filter=LocaleICUTest passes.

Review URL: https://codereview.chromium.org/398583004

git-svn-id: svn://svn.chromium.org/blink/trunk@178224 bbb929c8-8fbe-4397-9dbb-9b2b20218538