Use path in name for test262-es6

Use path in name for test262-es6

For ES5 the file names always included the whole path, like this:

  ch15/15.2/15.2.3/15.2.3.14/15.2.3.14-1-3.js

For ES6 this is no longer true:

  language/computed-property-names/basics/symbol.js
  language/computed-property-names/class/method/symbol.js

To allow the status file to correctly identify the right test we need
to change the reported test name to include the whole path.

BUG=None
LOG=N
R=rossberg@chromium.org, machenbach@chromium.org

Review URL: https://codereview.chromium.org/1001613002

Cr-Commit-Position: refs/heads/master@{#27167}