Update from https://crrev.com/304715

tools/clang/scripts/package.sh

 #!/bin/bash
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # This script will check out llvm and clang, and then package the results up
 # to a tgz file.
 
 gcc_toolchain=
 
@@ skipping 55 matching lines @@
 svn stat "${LLVM_DIR}/projects/libcxx" 2>&1 | tee -a buildlog.txt
 svn diff "${LLVM_DIR}/projects/libcxx" 2>&1 | tee -a buildlog.txt
 echo "Diff in llvm/projects/libcxxabi:" | tee -a buildlog.txt
 svn stat "${LLVM_DIR}/projects/libcxxabi" 2>&1 | tee -a buildlog.txt
 svn diff "${LLVM_DIR}/projects/libcxxabi" 2>&1 | tee -a buildlog.txt
 
 
 echo "Starting build" | tee -a buildlog.txt
 
 set -exu
+set -o pipefail
 
 # Do a clobber build.
 rm -rf "${LLVM_BOOTSTRAP_DIR}"
 rm -rf "${LLVM_BOOTSTRAP_INSTALL_DIR}"
 rm -rf "${LLVM_BUILD_DIR}"
 extra_flags=
 if [[ -n "${gcc_toolchain}" ]]; then
   extra_flags="--gcc-toolchain ${gcc_toolchain}"
 fi
 "${THIS_DIR}"/update.sh --bootstrap --force-local-build --run-tests \
@@ skipping 88 matching lines @@
 
 if [ "$(uname -s)" = "Darwin" ]; then
   PLATFORM=Mac
 else
   PLATFORM=Linux_x64
 fi
 
 echo To upload, run:
 echo gsutil cp -a public-read $PDIR.tgz \
      gs://chromium-browser-clang/$PLATFORM/$PDIR.tgz