Update PNaCl DEPS.
Update PNaCl DEPS.

Pull in:
  - libstdc++: Fix C++11 <thread> for PNaCl

R=dschuff@google.com
TEST= ./scons run_thread_cpp11_test bitcode=1
BUG= https://code.google.com/p/nativeclient/issues/detail?id=3475

Review URL: https://codereview.chromium.org/22639002

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@11950 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

Lind-Project/native_client,Lind-Project/native_client,Lind-Project/native_client,Lind-Project/native_client,Lind-Project/native_client,Lind-Project/native_client