Revert "Remove hyphen dictionary from WebKitUnitTests isolate file."

This reverts commit r155269.  It was causing problems on the android build:
http://build.chromium.org/p/chromium.webkit/builders/Android%20Tests%20(dbg)/builds/11392/steps/webkit_unit_tests/logs/stdio

TBR=ojan

Review URL: https://codereview.chromium.org/21405005

git-svn-id: svn://svn.chromium.org/blink/trunk@155281 bbb929c8-8fbe-4397-9dbb-9b2b20218538