Fix build_deb.sh script to work for any out directory, not only out/Release

remoting/host/installer/linux/build-deb.sh

 #!/bin/bash -e
 
 # 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.
 
 SCRIPTDIR="$(dirname "$(readlink -f "$0")")"
 PACKAGE="chrome-remote-desktop"
 ARCHITECTURE=$(dpkg-architecture | awk -F '=' '/DEB_BUILD_ARCH=/{print $2}')
 REPOCONFIG="deb http://dl.google.com/linux/chrome-remote-desktop/deb/ stable main"
@@ skipping 22 matching lines @@
                   -f $remoting_version_path -t "@PATCH@")
   version_full="$version_major.$version_minor.$version_build.$version_patch"
   echo $version_full
 }
 
 usage() {
   echo "usage: $(basename $0) [-hp] [-o path] [-s path]"
   echo "-h     this help message"
   echo "-p     just print the expected DEB filename that this will build."
   echo "-s     path to the top of the src tree."
-  echo "-o     path to write the DEB file to."
+  echo "-o     output directory path."
 }
 
 while getopts ":s:o:ph" OPTNAME
 do
   case $OPTNAME in
     s )
       src_root="$(readlink -f "$OPTARG")"
       ;;
     o )
       OUTPUT_PATH="$(readlink -f "$OPTARG")"
@@ skipping 46 matching lines @@
 if [[ -n "$merge_head" ]]; then
   revision="$(git svn find-rev "$merge_head" 2>/dev/null || true)"
 else
   # Official builders still use svn-based builds.
   revision="$(svn info . | awk '/^Revision: /{print $2}')"
 fi
 if [[ -n "$revision" ]]; then
   revision_text="(r$revision)"
 fi
 
+if [[ ! "$OUTPUT_PATH" ]]; then
+  OUTPUT_PATH="${SCRIPTDIR}/../../../../out/Release"
+fi
+
 echo "Building version $version_full $revision_text"
 
 # Create a fresh debian/changelog.
 export DEBEMAIL="The Chromium Authors <chromium-dev@chromium.org>"
 rm -f debian/changelog
 debchange --create \
   --package "$PACKAGE" \
   --newversion "$version_full" \
   --force-distribution \
   --distribution unstable \
   "New Debian package $revision_text"
 
 
-CRON_SCRIPT_DIR="${SCRIPTDIR}/../../../../out/Release/remoting/installer/cron"
+CRON_SCRIPT_DIR="${OUTPUT_PATH}/remoting/installer/cron"
 mkdir -p ${CRON_SCRIPT_DIR}
 process_template \
     "${SCRIPTDIR}/../../../../chrome/installer/linux/common/repo.cron" \
     "${CRON_SCRIPT_DIR}/chrome-remote-desktop"
 
 # TODO(mmoss): This is a workaround for a problem where dpkg-shlibdeps was
 # resolving deps using some of our build output shlibs (i.e.
 # out/Release/lib.target/libfreetype.so.6), and was then failing with:
 #   dpkg-shlibdeps: error: no dependency information found for ...
 # It's not clear if we ever want to look in LD_LIBRARY_PATH to resolve deps,
 # but it seems that we don't currently, so this is the most expediant fix.
 SAVE_LDLP=$LD_LIBRARY_PATH
 unset LD_LIBRARY_PATH
-dpkg-buildpackage -b -us -uc
+BUILD_DIR=$OUTPUT_PATH dpkg-buildpackage -b -us -uc
 LD_LIBRARY_PATH=$SAVE_LDLP
 
-if [[ "$OUTPUT_PATH" ]]; then
-  mv ../${PACKAGE}_*.deb "$OUTPUT_PATH"/
-  mv ../${PACKAGE}_*.changes "$OUTPUT_PATH"/
-fi
+mv ../${PACKAGE}_*.deb "$OUTPUT_PATH"/
+mv ../${PACKAGE}_*.changes "$OUTPUT_PATH"/