Disable memcmp interceptor in ThreadSanitizer.

Disable memcmp interceptor in ThreadSanitizer.

The same was done for MSan last week.
This is detecting real bugs that we don't have time to fix.

BUG=523384, 523428
TBR=hans@chromium.org
NOTRY=true

Committed: https://crrev.com/778714327250971065e6b5687057925e75518d44
Cr-Commit-Position: refs/heads/master@{#345126}

[eugenis, 2015-08-24 18:19:10]

eugenis@chromium.org changed reviewers:
+ glider@chromium.org, kcc@chromium.org

[eugenis, 2015-08-24 18:19:12]

The CQ bit was checked by eugenis@chromium.org

[commit-bot: I haz the power, 2015-08-24 18:19:50]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1311163003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1311163003/1

[commit-bot: I haz the power, 2015-08-24 18:25:26]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-08-24 18:26:23]

Patchset 1 (id:??) landed as
https://crrev.com/778714327250971065e6b5687057925e75518d44
Cr-Commit-Position: refs/heads/master@{#345126}

[hans, 2015-08-24 18:30:47]

lgtm

[kcc1, 2015-08-24 18:54:49]

On 2015/08/24 18:30:47, hans wrote:
> lgtm

Do you have to disable memcmp completely? 
It was on by default in tsan before my change, just not in the strict mode. 
So, maybe strict_memcmp=0?