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

third_party/psutil/examples/disk_usage.py

+#!/usr/bin/env python
+#
+# $Id: disk_usage.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.
+
+"""
+List all mounted disk partitions a-la "df -h" command.
+"""
+
+import sys
+import psutil
+
+def convert_bytes(n):
+    if n == 0:
+        return "0B"
+    symbols = ('k', 'M', 'G', 'T', 'P', 'E', 'Z', 'Y')
+    prefix = {}
+    for i, s in enumerate(symbols):
+        prefix[s] = 1 << (i+1)*10
+    for s in reversed(symbols):
+        if n >= prefix[s]:
+            value = float(n) / prefix[s]
+            return '%.1f%s' % (value, s)
+
+
+def main():
+    templ = "%-17s %8s %8s %8s %5s%% %9s  %s"
+    print templ % ("Device", "Total", "Used", "Free", "Use ", "Type", "Mount")
+    for part in psutil.disk_partitions(all=False):
+        usage = psutil.disk_usage(part.mountpoint)
+        print templ % (part.device,
+                       convert_bytes(usage.total),
+                       convert_bytes(usage.used),
+                       convert_bytes(usage.free),
+                       int(usage.percent),
+                       part.fstype,
+                       part.mountpoint)
+
+if __name__ == '__main__':
+    sys.exit(main())