NaCl: Update revision in DEPS, 456d6e4 -> 88ba651

NaCl: Update revision in DEPS, 456d6e4 -> 88ba651

This pulls in the following Native Client changes:

db9cc20: (kschimpf@google.com) Allow generation of trybots for sanitized toolchain.
0d8d330: (tfarina@chromium.org) More source_prereqs -> inputs changes.
db7f23a: (dschuff@chromium.org) Update newlib revision in COMPONENT_REVISIONS
88ba651: (dschuff@chromium.org) Update revision for PNaCl

BUG=none
TEST=browser_tests and nacl_integration
CQ_EXTRA_TRYBOTS=tryserver.chromium.linux:linux_chromium_dbg_32_ng,linux_arm_compile,linux_nacl_sdk_build

Committed: https://crrev.com/c9316d484825c72d4a87171d94fc74b78a889bfb
Cr-Commit-Position: refs/heads/master@{#317752}

[Mark Seaborn, 2015-02-24 00:48:47]

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

[JF, 2015-02-24 02:05:01]

(〃￣ω￣〃ゞ lgtm

[Mark Seaborn, 2015-02-24 02:20:50]

The CQ bit was checked by mseaborn@chromium.org

[commit-bot: I haz the power, 2015-02-24 02:21:30]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/951733002/1

[commit-bot: I haz the power, 2015-02-24 03:41:12]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-02-24 03:42:00]

Patchset 1 (id:??) landed as
https://crrev.com/c9316d484825c72d4a87171d94fc74b78a889bfb
Cr-Commit-Position: refs/heads/master@{#317752}