Update third_party/psutil and fix the licence issue with it.

third_party/psutil/examples/killall.py

+#!/usr/bin/env python
+#
+# $Id: killall.py 1143 2011-10-05 19:11:59Z g.rodola $
+#
+# Copyright (c) 2009, Jay Loden, Giampaolo Rodola'. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""
+Kill a process by name.
+"""
+
+import os
+import sys
+import psutil
+
+def main():
+    if len(sys.argv) != 2:
+        sys.exit('usage: %s name' % __file__)
+    else:
+        NAME = sys.argv[1]
+
+    killed = []
+    for proc in psutil.process_iter():
+        if proc.name == NAME and proc.pid != os.getpid():
+            proc.kill()
+            killed.append(proc.pid)
+    if not killed:
+        sys.exit('%s: no process found' % NAME)
+    else:
+        sys.exit(0)
+
+sys.exit(main())