NaCl: Update revision in DEPS, r8655 -> r8676

NaCl: Update revision in DEPS, r8655 -> r8676

This pulls in the following Native Client changes:

r8656: (mseaborn) sel_main_chrome: Add an interface for setting the /dev/urandom FD
r8657: (halyavin) Test for debug stub with real gdb.
r8658: (halyavin) Gcl commited file not in CL. Revert for this.
r8659: (halyavin) Skip qualification test when gdb tests are run with asan.
r8660: (mseaborn) Scons: Move some glibc-test-disabling logic out of SConstruct
r8661: (mseaborn) Remove nacl_file.cc and the src/untrusted/ppapi directory
r8662: (mseaborn) libpthread: Remove a comment which I missed in my earlier change
r8663: (bradchen) Update build/untrusted.gyp for glibc builds
r8664: (mseaborn) Enable running nacl-glibc tests under the IRT
r8665: (bbudge) Update Chrome revision in NaCl DEPS.
r8667: (jvoung) Bump llvm rev for cleanup (removing -arm_static_tls flag).
r8668: (bsy) Change lock_impl_win.cc to use CRITICAL_SECTION objects.
r8669: (kschimpf) Generalize the concept of two instructions executing atomically.
r8670: (mseaborn) Thread suspension: Implement for Linux
r8671: (mseaborn) Build untrusted code with "-g" to get debugging info
r8672: (khim) Fix for bug #2796
r8674: (jvoung) Switch perf expectations size test from checking
r8675: (scottmg) avoid noise from assembler wrapper when preprocessing
r8676: (mseaborn) IRT threading: Add a test for TLS inside the IRT

BUG=none
TEST=nacl_integration

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=138432

[bbudge, 2012-05-22 20:11:19]

lgtm