NaCl: Update revision in DEPS, r9262 -> r9277

This pulls in the following Native Client changes:

r9263: (eaeltsin) Debug stub: make gdb tests out file names consistent
r9264: (halyavin) Update gdb revision.
r9265: (jvoung) Bump chrome revision to 148535 in NaCl.
r9267: (jvoung) Properly guard the known-bug check introduced in 9254. Skip it if there
r9268: (robertm) Remove LLVM tblgen binaries from the PNaCl toolchain
r9269: (robertm) Do not export header files we decided should not be part of the untrusted toolchains.
r9270: (mseaborn) ARM: Rename the "new_eip" field in NaClThreadContext to "new_prog_ctr"
r9271: (jvoung) Revert "Bump chrome revision to 148535 in NaCl."
r9272: (dschuff) Bitcode stability test with archived frontend and current backend
r9274: (mseaborn) Implement a sigreturn-like NaClSwitchAllRegs() operation
r9275: (dschuff) Remove archived pexe scons tests
r9276: (dschuff) Change displayed CommandTest name for pnacl
r9277: (pasko) validator_ragel: allow multiple errors in tests

BUG=none
TEST=nacl_integration

Review URL: https://chromiumcodereview.appspot.com/10827070

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@148762 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": "9262",
+  "nacl_revision": "9277",
   # After changing nacl_revision, run 'glient sync' and check native_client/DEPS
   # to update other nacl_*_revision's.
   "nacl_tools_revision": "9016",  # native_client/DEPS: tools_rev