NaCl: Update revision in DEPS, r12422 -> r12443

NaCl: Update revision in DEPS, r12422 -> r12443

This pulls in the following Native Client changes:

r12423: (mcgrathr) Deploy new x86 binutils
r12424: (kschimpf) PNaCl: Update LLVM revision in pnacl/COMPONENT_REVISIONS
r12425: (bradnelson) Run annotator script through runtest.py.
r12426: (bradnelson) Fixing missing space in python expression for echo.
r12427: (bradnelson) Handle echo messages specially.
r12428: (bradnelson) Don't run batch files through runtest.py.
r12429: (dschuff) toolchain_build: Add source packages, incremental builds and LLVM build
r12430: (dschuff) Fix bad indentation from r12429
r12431: (mseaborn) Revert r12429, r12430: toolchain_build changes which broke the build
r12432: (mseaborn) PNaCl: Make deps_update.py work with libc++ and other components
r12433: (mseaborn) PNaCl: Update libc++ revision in pnacl/COMPONENT_REVISIONS: file list change
r12434: (jfb) Update libc++ known failures
r12435: (mcgrathr) toolchain_build: Update newlib revision for ARM toolchain
r12436: (jfb) Build biased bitcode properly for libc++
r12437: (jvoung) Re-apply "PNaCl ld: fix private libraries once more." with more fixes.
r12438: (mcgrathr) Deploy new ARM toolchain
r12439: (kschimpf) Revert "PNaCl: Update LLVM revision in pnacl/COMPONENT_REVISIONS"
r12440: (dschuff) Ensure the x86-64 IRT is built with libstdc++
r12441: (dschuff) toolchain_build: Add source packages, incremental builds and LLVM build
r12442: (dschuff) Use -v option to toolchain_build_pnacl in PNaCl toolchain buildbot script
r12443: (kschimpf) PNaCl: Update LLVM revision in pnacl/COMPONENT_REVISIONS

BUG=none
TEST=browser_tests and nacl_integration