NaCl: Update revision in DEPS, r6631 -> r6641

NaCl: Update revision in DEPS, r6631 -> r6641

This pulls in the following Native Client changes:

r6632: (pdox) Update UPSTREAM_REV to c98f5e2f94f5 to pull in
r6633: (pdox) Roll toolchain DEPS to 6632.
r6634: (eugenis) Another way of killing the browser in browser tests.
r6635: (jvoung) Fix perf log output to match expected syntax on spec2k bots ([] instead of {}).
r6636: (sanga) Pulling back revision 6635 and 6634 due to broken builds.
r6637: (pdox) Revert 6636, which reverted 6635 and 6634, to determine if the build failures are real or flakes.
r6638: (robertm) Better organization of pnacl torture test failures.
r6639: (khim) Bump glibc to 3a982eb
r6640: (jvoung) Change llc triple to use nacl instead of linux.
r6641: (bradnelson) Pulling in newer chrome rev.

BUG=none
TEST=nacl_integration


Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=99896

[Mark Seaborn, 2011-09-06 23:05:03]

Today's DEPS update.  There's a lot of reverts in this revision log. :-/

[bradn, 2011-09-06 23:07:30]

LGTM

[commit-bot: I haz the power, 2011-09-07 02:02:13]

Change committed as 99896