Roll UPSTREAM_REV and make other changes needed to bring in CL:

pnacl/build.sh

 #!/bin/bash
 # Copyright (c) 2011 The Native Client Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 #
 #@                 Untrusted Toolchain Manager
 #@-------------------------------------------------------------------
 #@ This script builds the ARM and PNaCl untrusted toolchains.
 #@ It MUST be run from the native_client/ directory.
 #
@@ skipping 230 matching lines @@
 SBTC_PRODUCTION=${SBTC_PRODUCTION:-false}
 
 # Which toolchain to use for each arch.
 if ${LIBMODE_NEWLIB}; then
   SBTC_BUILD_WITH_PNACL="arm x8632 x8664"
 else
   SBTC_BUILD_WITH_PNACL="x8632 x8664"
 fi
 
 # Current milestones in each repo
-readonly UPSTREAM_REV=${UPSTREAM_REV:-0c266fce855a}
+readonly UPSTREAM_REV=${UPSTREAM_REV:-79e32eea70b9}
 
 readonly NEWLIB_REV=c6358617f3fd
 readonly BINUTILS_REV=17a01203bd48
 readonly COMPILER_RT_REV=1a3a6ffb31ea
 
 readonly LLVM_PROJECT_REV=${LLVM_PROJECT_REV:-143276}
 readonly LLVM_MASTER_REV=${LLVM_PROJECT_REV}
 readonly LLVM_GCC_MASTER_REV=${LLVM_PROJECT_REV}
 readonly CLANG_REV=${LLVM_PROJECT_REV}
 readonly DRAGONEGG_REV=${LLVM_PROJECT_REV}
@@ skipping 3602 matching lines @@
 
 if [ "$(type -t $1)" != "function" ]; then
   #Usage
   echo "ERROR: unknown function '$1'." >&2
   echo "For help, try:"
   echo "    $0 help"
   exit 1
 fi
 
 "$@"