NaCl: Update revision in DEPS, r12619 -> r12642

This pulls in the following Native Client changes:

r12620: (jvoung) Move PNaCl toolchain REV file to driver "build" and directory. Flip on win.
r12621: (mseaborn) PNaCl: Refactor how Git bundles are checked out on the trybots
r12622: (mcgrathr) toolchain_build: Switch mpc to 1.0.2
r12623: (jvoung) Update translate-fast compile-time perf expectations, due to "tail" call.
r12624: (jvoung) Remove a couple of dead variables in pnacl drivers.
r12625: (jfb) Update TOOL_REVISIONS for PNaCl r12611->r12624
r12627: (jvoung) Allow run.py to work from non-nacl WD, fix some PNaCl TC bots.
r12628: (dschuff) toolchain_build_pnacl.py: Build newlib
r12629: (bradnelson) Add support for detach and kill to the debug stub.
r12631: (mcgrathr) Update tools_rev in DEPS
r12633: (dschuff) Add missing import to toolchain_build.py
r12634: (ncbray) Update thread creation perf expectations after Lucid->Precise upgrade
r12635: (mcgrathr) Don't pass -D_I386MACH_ALLOW_HW_INTERRUPTS explicitly in newlib build
r12636: (mseaborn) PNaCl: Fix "verify" step that checks for ARM hard-float ABI tag in .o files
r12637: (mseaborn) PNaCl: Turn off LLVM's auto-vectorizer in driver script for now
r12638: (mseaborn) Remove unused kAddrDelta variable that Clang 3.4 warns about
r12639: (sbc) Revert "Add gyp build of sel_ldr and irt_core for ARM."
r12640: (mseaborn) PNaCl: Update libcxxabi revision to merge from upstream
r12641: (jfb) Update TOOL_REVISIONS for PNaCl r12624->r12640
r12642: (phosek) Process creation test

BUG=none
TEST=browser_tests and nacl_integration

Review URL: https://codereview.chromium.org/138163007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@246505 0039d316-1c4b-4281-b951-d872f2087c98
Update .DEPS.git

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@246506 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 246506
Blink roll 165538:165574

http://build.chromium.org/f/chromium/perf/dashboard/ui/changelog_blink.html?url=/trunk&range=165539:165574&mode=html
TBR=
BUG=

Review URL: https://codereview.chromium.org/141033007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@246507 0039d316-1c4b-4281-b951-d872f2087c98
Update .DEPS.git

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@246508 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 246508