NaCl: Update revision in DEPS, r9370 -> r9391

This pulls in the following Native Client changes:

r9371: (khim) Add missing REXW case
r9372: (khim) Add validator_internals.html documentation
r9373: (khim) Add branch hints to j[er]cxz and loop{,e,ne} instructions
r9374: (robertm) PNaCl toolchain: Remove unused binutils static libs and headers
r9375: (kschimpf) Remove unnecessary inlines in methods defined within the class definition.
r9376: (sehr) Get negative displacement change.
r9377: (dschuff) Get gold RPC error update
r9378: (arbenson) Move low page protection to nacl_helper_bootstrap
r9379: (bradnelson) Revert 9378 - Move low page protection to nacl_helper_bootstrap
r9380: (shcherbina) Validator_ragel tests: make --nthreads optional
r9381: (robertm) Add step for packaging tranlators and use it on one buildbot.
r9382: (jvoung) Allow slower AllocAddrSpace step for xp-bare-metal bot.
r9383: (mseaborn) Testing: Reuse RegsAssertEqual() in the trusted-code part of tests
r9384: (robertm) Fix missing env variable renames.
r9385: (arbenson) Move low page protection to nacl_helper_bootstrap
r9386: (dschuff) Update Pnacl toolchain DEPS to 9380
r9387: (khim) Improve compatibility with existing validator
r9388: (phosek) Removed all NaClAppVmmap* functions since they are no longer being used.
r9389: (bradchen) Make ragel_tester more strict, to align better with nacl_tester
r9390: (khim) Fix OWNERS for validator_ragel
r9391: (shcherbina) validator_ragel: simplify scons definition of dfagen

BUG=none
TEST=nacl_integration

Review URL: https://chromiumcodereview.appspot.com/10854022

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@150377 0039d316-1c4b-4281-b951-d872f2087c98

DEPS

@@ -12,7 +12,7 @@ vars = {
   "chromium_git": "http://git.chromium.org/git",
   "chromiumos_git": "http://git.chromium.org/chromiumos",
   "swig_revision": "69281",
-  "nacl_revision": "9370",
+  "nacl_revision": "9391",
   # After changing nacl_revision, run 'glient sync' and check native_client/DEPS
   # to update other nacl_*_revision's.
   "nacl_tools_revision": "9330",  # native_client/DEPS: tools_rev