Handle updates to the wrapper script.

remoting/host/installer/linux/debian/preinst

Index: remoting/host/installer/linux/debian/preinst
diff --git a/remoting/host/installer/linux/debian/preinst b/remoting/host/installer/linux/debian/preinst
new file mode 100755
index 0000000000000000000000000000000000000000..faa38559597c9260ae20c83663536302b2b7c646
--- /dev/null
+++ b/remoting/host/installer/linux/debian/preinst
@@ -0,0 +1,26 @@
+#!/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.
+
+set -e
+
+VAR_DIR="/var/lib/chrome-remote-desktop"
+HASHES_FILE="$VAR_DIR/hashes"
+
+save_hash() {
+  if [ -f "$1" ]; then
+    mkdir -p "$VAR_DIR"
+    md5sum "$1" >> "$HASHES_FILE"
+  fi
+}
+
+case "$1" in
+  "install" | "upgrade")
+    rm -f "$HASHES_FILE"
+    save_hash /usr/bin/me2me_virtual_host
+    ;;
+esac
+
+#DEBHELPER#