Roll libvpx 97404d:4a3206

Roll libvpx 97404d:4a3206

996e952  libvpx: set clang_warning_flags for all platforms
4a32064  libvpx: add -Wno-conversion for Clang builds, gn edition

BUG=431803
Committed: https://crrev.com/a35a12b4ec0fa5e2a0833b2e44f5797e53cbcca6
Cr-Commit-Position: refs/heads/master@{#307061}

[hans, 2014-12-05 17:50:26]

hans@chromium.org changed reviewers:
+ tomfinegan@chromium.org

[hans, 2014-12-05 17:50:26]

Please take a look.

[Tom Finegan, 2014-12-05 18:42:19]

On 2014/12/05 17:50:26, hans wrote:
> Please take a look.

lgtm

[hans, 2014-12-05 18:48:47]

The CQ bit was checked by hans@chromium.org

[commit-bot: I haz the power, 2014-12-05 18:50:06]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/784543002/1

[commit-bot: I haz the power, 2014-12-05 19:46:23]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-12-05 19:47:54]

Patchset 1 (id:??) landed as
https://crrev.com/a35a12b4ec0fa5e2a0833b2e44f5797e53cbcca6
Cr-Commit-Position: refs/heads/master@{#307061}