NaCl: Update revision in DEPS, r6641 -> r6668
NaCl: Update revision in DEPS, r6641 -> r6668

This pulls in the following Native Client changes:

r6642: (mcgrathr) Update Chrome revision
r6643: (halyavin) Enable browser tests with glibc, part 3
r6644: (sehr) Update utman to get read sandboxing changes.
r6645: (robertm) Make prerequisite building a seperate step in the  spec script.
r6646: (ncbray) Clean up build output on the Chrome bots.
r6647: (mcgrathr) Support --whole-archive/--no-whole-archive in pnacl-ld
r6648: (kschimpf) `Move the segment based decoder table generator to its own directory.
r6649: (jasonwkim) Add enum NaClSBKind argument to trusted code for selecting validator kind
r6650: (jasonwkim) commit
r6651: (jasonwkim) Add enum NaClSBKind argument to trusted code for selecting validator kind.
r6652: (jasonwkim) revert 6651
r6653: (pdox) Comment change to trigger rebuild.
r6654: (khim) Remove hack which converted symlinks to hardlinks on Windows.
r6655: (pdox) Give utman the ability to download the subversion LLVM and LLVM-GCC repositories.
r6656: (kschimpf) Turn on using the partial decoder tables for the x86-64 validator. Shrinks
r6657: (jvoung) Pull in newer version of chrome (99948).
r6658: (sehr) Separate ARM trusted toolchain verion from pnacl.
r6659: (mcgrathr) Update toolchain DEPS to 6655
r6660: (mcgrathr) Fix find_toolchain_revisions.py for linux-arm_trusted changes
r6661: (dspringer) Add tar manifest creation to caching logic.
r6662: (bradnelson) Move trybots archive to a separate bucket.
r6663: (robertm) Fixed some string matching bugs in the spec2k run script.
r6664: (jvoung) Update llvm rev for cleanup patch: http://codereview.chromium.org/7841019/
r6665: (pdox) Update merge-tool.sh and other scripts to get new LLVM merging buildbot working.
r6666: (mcgrathr) Fix dependencies in run_whole_archive_test, enable for PNaCl
r6667: (elijahtaylor) Change oprofile processor to allow events from nacl_helper_bootstrap.
r6668: (ncbray) Split building from testing in nacl_integration.

BUG=none
TEST=nacl_integration


Review URL: http://codereview.chromium.org/7841055

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@100333 0039d316-1c4b-4281-b951-d872f2087c98

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