NaCl: Update revision in DEPS, r13261 -> r13267

This pulls in the following Native Client changes:

r13262: (noelallen) Automate file and symlinks copy for libstdc++
r13263: (bradnelson) Use chromium credential if no other credential is available.
r13264: (sdefresne) Fix quoting of arguments on Linux/Mac
r13265: (bradnelson) Switch to hard float for arm.
r13266: (mseaborn) command_tester: Reduce verbosity of the output
r13267: (mseaborn) Cleanup: Remove unused Gyp definition of libpthread_private

BUG=none
TEST=browser_tests and nacl_integration

Review URL: https://codereview.chromium.org/313663002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@274625 0039d316-1c4b-4281-b951-d872f2087c98

DEPS

@@ -34,7 +34,7 @@ vars = {
   "pdfium_git": "https://pdfium.googlesource.com",
   "skia_git": "https://skia.googlesource.com",
   "swig_revision": "230490",
-  "nacl_revision": "13261",
+  "nacl_revision": "13267",
   # After changing nacl_revision, run 'glient sync' and check native_client/DEPS
   # to update other nacl_*_revision's.
   "nacl_tools_revision": "13077",  # native_client/DEPS: tools_rev