Sysroot: Add build_and_upload.py

build/linux/sysroot_scripts/sysroot-creator-precise.sh

 #!/bin/bash
 # Copyright 2016 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.
 
-SCRIPT_DIR=$(dirname $0)
+SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 
 DISTRO=ubuntu
 DIST=precise
 DIST_UPDATES=precise-updates
 
 # This is where we get all the debian packages from.
 APT_REPO=http://archive.ubuntu.com/ubuntu
 APT_REPO_ARM=http://ports.ubuntu.com
 APT_REPO_ARM64=http://ports.ubuntu.com
 KEYRING_FILE=/usr/share/keyrings/ubuntu-archive-keyring.gpg
 
 HAS_ARCH_AMD64=1
-HAS_ARCH_I386=1
-HAS_ARCH_ARM=1
+
+# Precise supports these architectures but they are not needed by chrome.
+# HAS_ARCH_I386=1
+# HAS_ARCH_ARM=1
 
 # Sysroot packages: these are the packages needed to build chrome.
 # NOTE: When DEBIAN_PACKAGES is modified, the packagelist files must be updated
 # by running this script in GeneratePackageList mode.
 DEBIAN_PACKAGES="\
   comerr-dev
   gcc-4.6
   krb5-multidev
   libasound2
   libasound2-dev
@@ skipping 164 matching lines @@
   x11proto-render-dev
   x11proto-scrnsaver-dev
   x11proto-xext-dev
   zlib1g
   zlib1g-dev
 "
 
 DEBIAN_PACKAGES_X86="libquadmath0"
 DEBIAN_PACKAGES_ARM="libdrm-omap1"
 
-. ${SCRIPT_DIR}/sysroot-creator.sh
+. "${SCRIPT_DIR}/sysroot-creator.sh"