NaCl: Update revision in DEPS, 6937d61 -> 660eb1e

NaCl: Update revision in DEPS, 6937d61 -> 660eb1e

This pulls in the following Native Client changes:

9838694: (mcgrathr@chromium.org) toolchain_build: Drop newlib build
91f01b7: (sbc@chromium.org) Prep for update to latest QEMU version
5082113: (sbc@chromium.org) Always build qemu binaries against debian/stable
70d1137: (sbc@chromium.org) Update packages used in trusted ARM toolchain builds
1ebd2e9: (sbc@chromium.org) Roll third_party 7e4c045:d4e38e5
39dc39e: (sbc@chromium.org) Honor TMPDIR for location of shared memory files
d98a8f5: (sbc@chromium.org) Cleanup ARM trusted-toolchain-creator scripts
33b66c4: (sbc@chromium.org) Merge two ARM trusted toolchain scripts into a single one
336e9dd: (dschuff@chromium.org) toolchain_build: Avoid python tracebacks for package build errors
f28be0f: (mseaborn@chromium.org) Update pnacl/deps_update.py to use PNaCl's current binutils branch (2.25)
bb657a4: (mseaborn@chromium.org) PNaCl: Update Binutils revision in pnacl/COMPONENT_REVISIONS: Remove libsrpc reference
8a3b005: (dschuff@chromium.org) Switch arm-nacl-clang's default ld from gold to BFD ld
55c4485: (sbc@chromium.org) Update revision of arm sysroot image in arm_trusted.json
1163203: (mcgrathr@chromium.org) Update workaround for gn on "32-bit" bots, drop 32-bit gn binary
d51c8b7: (mcgrathr@chromium.org) Disable some tests that don't make sense for arm-nacl glibc
53d4189: (jvoung@chromium.org) Skip building cross ARM validator tests on x86 builds when skip_trusted_tests=1.
760db88: (jvoung@chromium.org) sel_main_chrome.c: Don't call NaClWaitForStartModuleCommand. Get load status directly.
660eb1e: (dschuff@chromium.org) Update revision for PNaCl

Changes: https://chromium.googlesource.com/native_client/src/native_client/+log/6937d61627c025d697f70b5a09d02f192a71e157..660eb1e1c91349b53f0d60bbf9a92e31f4cf4e1d

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/5cf24dc9e0ab660cd7481f7fb5d1fafcce87b561
Cr-Commit-Position: refs/heads/master@{#327739}

[Derek Schuff, 2015-04-30 17:13:41]

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

[Sam Clegg, 2015-04-30 17:28:24]

lgtm

[Derek Schuff, 2015-04-30 17:28:41]

The CQ bit was checked by dschuff@chromium.org

[commit-bot: I haz the power, 2015-04-30 17:29:05]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1113093002/1

[commit-bot: I haz the power, 2015-04-30 18:05:24]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-04-30 18:06:32]

Patchset 1 (id:??) landed as
https://crrev.com/5cf24dc9e0ab660cd7481f7fb5d1fafcce87b561
Cr-Commit-Position: refs/heads/master@{#327739}