NaCl: Update revision in DEPS, r13931 -> r13947

NaCl: Update revision in DEPS, r13931 -> r13947

This pulls in the following Native Client changes:

r13932: (jvoung) Keep the perf data of the trusted version of performance_tests separate.
r13933: (jvoung) Enable arm callingconv test for varargs and va_list.
r13934: (jvoung) Allow 'opt' bots to use GN with is_debug=false ('dbg' bots get debug).
r13935: (nfullagar) Initial benchmark suite for toolchain side.
r13936: (nfullagar) Add third_party/computer_language_benchmarks_game to DEPS
r13937: (petarj) [MIPS] Add missing -mtls-use-call when building irt libraries
r13942: (yyanagisawa) Avoid using mismatch compilers from buildbot.
r13947: (shyamsundarr) allow avx/xop/fma instructions but disable all them via def file attributes.

BUG=none
TEST=browser_tests and nacl_integration
CQ_EXTRA_TRYBOTS=tryserver.chromium.linux:linux_rel_precise32,linux_nacl_sdk,linux_chromium_dbg

Committed: https://crrev.com/207d610c577b9b5969aa93bed081ab161644c369
Cr-Commit-Position: refs/heads/master@{#300355}

[Mark Seaborn, 2014-10-20 20:50:53]

mseaborn@chromium.org changed reviewers:
+ dschuff@chromium.org

[Derek Schuff, 2014-10-20 21:00:43]

lgtm

[Mark Seaborn, 2014-10-20 21:13:58]

The CQ bit was checked by mseaborn@chromium.org

[commit-bot: I haz the power, 2014-10-20 21:16:05]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/667783002/1

[commit-bot: I haz the power, 2014-10-20 22:28:00]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-10-20 22:28:50]

Patchset 1 (id:??) landed as
https://crrev.com/207d610c577b9b5969aa93bed081ab161644c369
Cr-Commit-Position: refs/heads/master@{#300355}