GN, GYP: Remove -Wno-incompatible-pointer-types flag for building NSS.

GN, GYP: Remove -Wno-incompatible-pointer-types flag for building NSS.

This workaround is no longer needed as the NSS bug was fixed in NSS 3.12.10 (see: https://bugzilla.mozilla.org/show_bug.cgi?id=635778), and Chromium requires NSS 3.14.3 or later now.

BUG=138571
Committed: https://crrev.com/0b29bcaaf9afc46785a7b757fd4292fa07dfcef0
Cr-Commit-Position: refs/heads/master@{#297809}

[engedy, 2014-09-30 18:11:13]

engedy@chromium.org changed reviewers:
+ wtc@chromium.org

[engedy, 2014-09-30 18:24:36]

Wan-Teh: PTAL, this is a follow-up to
https://codereview.chromium.org/582403002/.

Note that this CL is already based on top of that, but for some strange reason I
cannot convince Rietveld to show the changes just for this second CL ("git cl
upstream" does not seem to be working properly).

[wtc, 2014-10-02 00:38:37]

Patch set 3 LGTM. Thanks!

[engedy, 2014-10-02 11:03:20]

Patchset #3 (id:40001) has been deleted

[engedy, 2014-10-02 11:03:28]

Patchset #2 (id:20001) has been deleted

[engedy, 2014-10-02 11:11:07]

The CQ bit was checked by engedy@chromium.org

[commit-bot: I haz the power, 2014-10-02 11:11:33]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/616093002/60001

[commit-bot: I haz the power, 2014-10-02 11:55:25]

Committed patchset #2 (id:60001) as 04e192c8e7468c66470dc9202b3082b2ac5f2d4f

[commit-bot: I haz the power, 2014-10-02 11:56:18]

Patchset 2 (id:??) landed as
https://crrev.com/0b29bcaaf9afc46785a7b757fd4292fa07dfcef0
Cr-Commit-Position: refs/heads/master@{#297809}