[Chromoting] Add version stamps to Mac installer and host scripts.

remoting/host/installer/mac/Scripts/remoting_postflight.sh

 #!/bin/sh
 
 # 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.
 
+# Version = @@VERSION@@
+
 HELPERTOOLS=/Library/PrivilegedHelperTools
 NAME=org.chromium.chromoting
 CONFIG_FILE="$HELPERTOOLS/$NAME.json"
 PLIST=/Library/LaunchAgents/org.chromium.chromoting.plist
 ENABLED_FILE="$HELPERTOOLS/$NAME.me2me_enabled"
 ENABLED_FILE_BACKUP="$ENABLED_FILE.backup"
 
 KSADMIN=/Library/Google/GoogleSoftwareUpdate/GoogleSoftwareUpdate.bundle/Contents/MacOS/ksadmin
 KSUPDATE=https://tools.google.com/service/update2
 KSPID=com.google.chrome_remote_desktop
 KSPVERSION=@@VERSION@@
 
 trap onexit ERR
 
 function onexit {
   # Log an error but don't report an install failure if this script has errors.
   logger An error occurred while launching the service
   exit 0
 }
 
+logger Running Chrome Remote Desktop postflight script @@VERSION@@
+
 # Create auth file (with correct owner and permissions) if it doesn't already
 # exist.
 if [[ ! -f "$CONFIG_FILE" ]]; then
   touch "$CONFIG_FILE"
   chmod 600 "$CONFIG_FILE"
   chmod +a "$USER:allow:read" "$CONFIG_FILE"
 fi
 
 # If there is a backup _enabled file, re-enable the service.
 if [[ -f "$ENABLED_FILE_BACKUP" ]]; then
@@ skipping 11 matching lines @@
 # user (using launchctl bsexec).
 set `ps aux | grep loginwindow.app | grep -v grep`
 USERNAME=$1
 USERID=$2
 if [[ -n "$USERNAME" && -n "$USERID" ]]; then
   launchctl bsexec "$USERID" sudo -u "$USERNAME" launchctl load -w -S Aqua "$PLIST"
 fi
 
 # Register a ticket with Keystone so we're updated.
 $KSADMIN --register --productid "$KSPID" --version "$KSPVERSION" --xcpath "$PLIST" --url "$KSUPDATE"