NaCl: Update revision in DEPS, abcb492 -> 1a45bb0

NaCl: Update revision in DEPS, abcb492 -> 1a45bb0

This pulls in the following Native Client changes:

df03d3e: (mseaborn@chromium.org) Cleanup: Move the definition of NaClValidationCache into src/public/
da0bb61: (jvoung@chromium.org) Update pnacl/deps_update to use origin/master as upstream.
fc039f6: (jvoung@chromium.org) Patch pnacl/deps_updater branch checkout method, previous commit broke it.
1a45bb0: (jvoung@chromium.org) PNaCl: Update LLVM revision in pnacl/COMPONENT_REVISIONS

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/d8d176fd0bec1913318803fe3b8d665211fb18a2
Cr-Commit-Position: refs/heads/master@{#316346}

[Mark Seaborn, 2015-02-14 00:44:59]

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

[Nick Bray (chromium), 2015-02-14 00:49:56]

LGTM

[Mark Seaborn, 2015-02-14 00:55:36]

The CQ bit was checked by mseaborn@chromium.org

[commit-bot: I haz the power, 2015-02-14 00:55:48]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/924803005/1

[commit-bot: I haz the power, 2015-02-14 01:05:27]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-02-14 01:06:11]

Patchset 1 (id:??) landed as
https://crrev.com/d8d176fd0bec1913318803fe3b8d665211fb18a2
Cr-Commit-Position: refs/heads/master@{#316346}