Expand fast/text/international/rtl-text-wrapping.html test

Update the fast/text/international/rtl-text-wrapping.html test to
include elements with explicit directionality.

BUG=348554
R=dglazkov@chromium.org

Review URL: https://codereview.chromium.org/195423004

git-svn-id: svn://svn.chromium.org/blink/trunk@168951 bbb929c8-8fbe-4397-9dbb-9b2b20218538