Roll Syzygy deps to 0.8.6.3.

Roll Syzygy deps to 0.8.6.4.

This also disable a few new features via the instrumentation script, in an attempt to chase down a memory corruption issue.

BUG=

Committed: https://crrev.com/cd5d2b8b014c1591999dca7f49cde2cb15b32cef
Cr-Commit-Position: refs/heads/master@{#320853}

[chrisha, 2015-03-16 20:55:20]

chrisha@chromium.org changed reviewers:
+ sebmarchand@chromium.org

[chrisha, 2015-03-16 20:56:22]

PTAL?

[Sébastien Marchand, 2015-03-16 20:56:59]

lgtm.

[chrisha, 2015-03-17 02:08:37]

The smoke tests have passed so I'm committing this.

http://chromegw.corp.google.com/i/client.syzygy/builders/Syzygy%20Smoke%20Tes...

[chrisha, 2015-03-17 02:08:44]

The CQ bit was checked by chrisha@chromium.org

[commit-bot: I haz the power, 2015-03-17 02:09:17]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1011743003/20001

[commit-bot: I haz the power, 2015-03-17 03:16:24]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-03-17 03:17:06]

Patchset 2 (id:??) landed as
https://crrev.com/cd5d2b8b014c1591999dca7f49cde2cb15b32cef
Cr-Commit-Position: refs/heads/master@{#320853}