NaCl: Update revision in DEPS, 0cf13c0 -> c814d50

NaCl: Update revision in DEPS, 0cf13c0 -> c814d50

This pulls in the following Native Client changes:

8259043: (dschuff@chromium.org) PNaCl: Update llvm revision in pnacl/COMPONENT_REVISIONS
32b600c: (mseaborn@chromium.org) Fix arch conditionals in validation_cache_test.cc to follow NaCl style
d7263af: (mseaborn@chromium.org) Validator: Fix minor regression in validation caching's handling of stub-out
604c5a2: (mseaborn@chromium.org) Remove documentation/examples.html, which is very out-of-date
c814d50: (mseaborn@chromium.org) Validator: Fix typo: "readonly_test" -> "readonly_text"

Changes: https://chromium.googlesource.com/native_client/src/native_client/+log/0cf13c015762a9fc573d2219a30100b8f4bf4cc2..c814d508b50aa04132c9fa1058b6884fed889615

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

Review URL: https://codereview.chromium.org/1315903002

Cr-Commit-Position: refs/heads/master@{#345406}