Add a version query string for the whispernet pnacl module.

Add a version query string for the whispernet pnacl module.

When updating Chrome, pNacl doesn't refresh the cached whispernet pNacl module
leading to a stale version of the whispernet module being used with the the
whispernet proxy extension. Adding a query parameter and reving it every time
we check in a new version of the module will ensure that pNacl will consider
the module a "new" file and will recreate its cache with it.

The current version of the library corresponds to CL number 77701403.

R=ckehoe@chromium.org
BUG=428424
Committed: https://crrev.com/b9e9abc6393c0fe9bd9e662a899598e6e9efb8b5
Cr-Commit-Position: refs/heads/master@{#301960}

[Charlie, 2014-10-29 21:25:17]

The CQ bit was checked by ckehoe@chromium.org

[Charlie, 2014-10-29 21:25:19]

lgtm

[commit-bot: I haz the power, 2014-10-29 21:29:56]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/684293002/1

[commit-bot: I haz the power, 2014-10-29 22:57:29]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-10-29 22:58:30]

Patchset 1 (id:??) landed as
https://crrev.com/b9e9abc6393c0fe9bd9e662a899598e6e9efb8b5
Cr-Commit-Position: refs/heads/master@{#301960}