[modules] Make duplicate export error deterministic.

[modules] Make duplicate export error deterministic.

In case of duplicate exports, always report the error for the very last
one.

R=adamk@chromium.org
BUG=v8:5358, v8:1569
Committed: https://crrev.com/da1f911c4269048d24a3442791b18523455f3b24
Cr-Commit-Position: refs/heads/master@{#39424}

[neis, 2016-09-12 14:17:24]

PTAL. It is probably preferable to report the first illegal entry but that would
require extra work.

[adamk, 2016-09-14 17:27:12]

lgtm

[neis, 2016-09-14 17:30:10]

The CQ bit was checked by neis@chromium.org

[commit-bot: I haz the power, 2016-09-14 17:30:23]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-09-14 17:56:25]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-09-14 17:57:19]

Description was changed from

==========
[modules] Make duplicate export error deterministic.

In case of duplicate exports, always report the error for the very last
one.

R=adamk@chromium.org
BUG=v8:5358,v8:1569
==========

to

==========
[modules] Make duplicate export error deterministic.

In case of duplicate exports, always report the error for the very last
one.

R=adamk@chromium.org
BUG=v8:5358,v8:1569

Committed: https://crrev.com/da1f911c4269048d24a3442791b18523455f3b24
Cr-Commit-Position: refs/heads/master@{#39424}
==========

[commit-bot: I haz the power, 2016-09-14 17:57:20]

Patchset 2 (id:??) landed as
https://crrev.com/da1f911c4269048d24a3442791b18523455f3b24
Cr-Commit-Position: refs/heads/master@{#39424}

[Michael Hablich, 2016-09-14 21:51:31]

A revert of this CL (patchset #2 id:20001) has been created in
https://codereview.chromium.org/2340903002/ by hablich@chromium.org.

The reason for reverting is: Seems to break one of our arm64 bots:
https://chromegw.corp.google.com/i/client.v8.ports/builders/V8%20Linux%20-%20....