NaCl: Update revision in DEPS, f418b37 -> cc78fa0

NaCl: Update revision in DEPS, f418b37 -> cc78fa0

This pulls in the following Native Client changes:

4db937c: (jfb@chromium.org) Update revision for PNaCl
db53905: (jvoung@chromium.org) PNaCl: Update LLVM revision in pnacl/COMPONENT_REVISIONS
04b09f1: (jfb@chromium.org) PNaCl: Update LLVM revision in pnacl/COMPONENT_REVISIONS
924decd: (hidehiko@chromium.org) Non-SFI mode: Enable C++11 features on gyp build.
7fe2747: (jfb@chromium.org) Overflow test: improve testing of signed values around 0
d632af2: (jfb@chromium.org) Update revision for PNaCl
cc78fa0: (sbc@chromium.org) Update sysroot creator scripts toolchain.

Changes: https://chromium.googlesource.com/native_client/src/native_client/+log/f418b37b22393d82c08d28ce1c151bed933d2c9b..cc78fa093218f9a9a5e576002e197e17da379023

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/2a83ad3c5cc6de1aaf87652a2cf0143e8b969638
Cr-Commit-Position: refs/heads/master@{#321511}

[Mark Seaborn, 2015-03-20 00:13:59]

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

[Mark Seaborn, 2015-03-20 00:14:00]

Please CQ this.

[JF, 2015-03-20 00:45:03]

(ू̯⋆̧ ͕⋆᷅ू̯ ) ༘˟lgtm

[Mark Seaborn, 2015-03-20 02:10:30]

The CQ bit was checked by mseaborn@chromium.org

[commit-bot: I haz the power, 2015-03-20 02:11:12]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1022923004/1

[commit-bot: I haz the power, 2015-03-20 03:45:14]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-03-20 03:45:58]

Patchset 1 (id:??) landed as
https://crrev.com/2a83ad3c5cc6de1aaf87652a2cf0143e8b969638
Cr-Commit-Position: refs/heads/master@{#321511}