Update shipping version of vs_addin.

Update shipping version of vs_addin.

This brings in the following changes to the addin:
r1578 Add default compiler include paths to visual studio
r1577 Cleanup create_package.py
r1576 Fix several issues with debugging PPAPI plugins
r1575 Update versions used for testing the addin
r1574 Only skip uploading of addin if the file already exists on google storage.

BUG= https://code.google.com/p/chromium/issues/detail?id=179121
R=binji@chromium.org

Committed: https://crrev.com/52e99c651cafbf8a30a0e6c982e6f22457408fe0
Cr-Commit-Position: refs/heads/master@{#296813}

[Sam Clegg, 2014-09-25 22:45:28]

sbc@chromium.org changed reviewers:
+ binji@chromium.org

[binji, 2014-09-25 22:48:58]

lgtm

[Sam Clegg, 2014-09-25 22:53:58]

Committed patchset #1 (id:1) manually as 52e99c6 (presubmit successful).

[commit-bot: I haz the power, 2014-09-25 22:54:02]

Patchset 1 (id:??) landed as
https://crrev.com/52e99c651cafbf8a30a0e6c982e6f22457408fe0
Cr-Commit-Position: refs/heads/master@{#296813}