NaCl: Update revision in DEPS, r12120 -> r12128

This pulls in the following Native Client changes:

r12121: (jvoung) Update PNaCl in TOOL_REVISIONS from 12074 -> 12111
r12122: (mseaborn) PNaCl: Update LLVM revision in pnacl/DEPS
r12123: (jvoung) Update PNaCl binutils rev to pull in pruning of demangling in sandboxed gold.
r12124: (petarj) [MIPS] Add FPU qualify functions
r12125: (jvoung) Add an EH test that must unwind through a function w/ FP callee-saved regs.
r12126: (mseaborn) PNaCl: Update LLVM revision in pnacl/DEPS
r12127: (sbc) Roll newlib toolchain builders
r12128: (sbc) Fix toolchain trybot scripts so the refer to new precise bots.

BUG=none
TEST=browser_tests and nacl_integration

Review URL: https://codereview.chromium.org/23587016

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@222049 0039d316-1c4b-4281-b951-d872f2087c98

DEPS

@@ -13,7 +13,7 @@ vars = {
   "chromiumos_git": "https://chromium.googlesource.com/chromiumos",
   "skia_git": "https://skia.googlesource.com",
   "swig_revision": "69281",
-  "nacl_revision": "12120",
+  "nacl_revision": "12128",
   # After changing nacl_revision, run 'glient sync' and check native_client/DEPS
   # to update other nacl_*_revision's.
   "nacl_tools_revision": "11437",  # native_client/DEPS: tools_rev