[test] Fix test archive clobber.

[test] Fix test archive clobber.

The old version would always clobber.

NOTRY=true
NOTREECHECKS=true

Committed: https://crrev.com/71bc7f8793adaf41047893ccc89560e8b0cf0b37
Cr-Commit-Position: refs/heads/master@{#28895}

[Michael Achenbach, 2015-06-10 09:05:34]

machenbach@chromium.org changed reviewers:
+ arv@chromium.org, jkummerow@chromium.org

[Michael Achenbach, 2015-06-10 09:05:41]

PTAL

[Jakob Kummerow, 2015-06-10 09:06:39]

lgtm

[Michael Achenbach, 2015-06-10 09:07:00]

The CQ bit was checked by machenbach@chromium.org

[commit-bot: I haz the power, 2015-06-10 09:07:10]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1177503005/1

[commit-bot: I haz the power, 2015-06-10 09:08:55]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-06-10 09:09:15]

Patchset 1 (id:??) landed as
https://crrev.com/71bc7f8793adaf41047893ccc89560e8b0cf0b37
Cr-Commit-Position: refs/heads/master@{#28895}

[arv (Not doing code reviews), 2015-06-10 14:11:41]

LGTM

I just verified that the same code does not exist in test/test262/testcfg.py...
which is strange by itself.

[Michael Achenbach, 2015-06-10 17:01:19]

On 2015/06/10 14:11:41, arv wrote:
> LGTM
> 
> I just verified that the same code does not exist in
test/test262/testcfg.py...
> which is strange by itself.

Yes - I just added it to test262-es6 only. Wasn't entirely sure about the
effects. Should be added to test262, too.