Suppress two extremely /analyze noisy warnings.

Suppress two extremely noisy /analyze warnings.

The raw output from a /analyze build is large -- about 370 MB. This is
unwieldy. It turns out that ~96% of the raw warning count is from two
warning types, and neither warning type is particularly valuable. So,
I'm suppressing them. This brings the warning output down to
~8 MB which is far more manageable, making it easier to look at in
buildbot output, faster to parse, faster to download, etc. And, the
two suppressed warnings have not been valuable so losing them is
not a problem.

BUG=427616
Committed: https://crrev.com/a2e871611f1b74569c98ac2265a7f31d41568725
Cr-Commit-Position: refs/heads/master@{#312678}

[brucedawson, 2015-01-22 17:34:06]

brucedawson@chromium.org changed reviewers:
+ scottmg@chromium.org

[scottmg, 2015-01-22 17:47:54]

lgtm

[brucedawson, 2015-01-22 17:49:14]

The CQ bit was checked by brucedawson@chromium.org

[commit-bot: I haz the power, 2015-01-22 17:50:53]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/862083003/1

[commit-bot: I haz the power, 2015-01-22 18:51:46]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-01-22 18:51:47]

Try jobs failed on following builders:
  linux_gpu on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/linux_gpu/builds/...)
  linux_gpu_triggered_tests on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/linux_gpu_trigger...)

Try jobs failed on following builders:
  linux_gpu_triggered_tests on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/linux_gpu_trigger...)

[brucedawson, 2015-01-22 21:13:10]

The CQ bit was checked by brucedawson@chromium.org

[commit-bot: I haz the power, 2015-01-22 21:14:04]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/862083003/1

[commit-bot: I haz the power, 2015-01-22 21:15:49]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-01-22 21:26:45]

Patchset 1 (id:??) landed as
https://crrev.com/a2e871611f1b74569c98ac2265a7f31d41568725
Cr-Commit-Position: refs/heads/master@{#312678}