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

third_party/psutil/psutil/_psutil_posix.h

Index: third_party/psutil/psutil/_psutil_posix.h
diff --git a/third_party/psutil/psutil/_psutil_posix.h b/third_party/psutil/psutil/_psutil_posix.h
new file mode 100644
index 0000000000000000000000000000000000000000..8a1f52257c9bdf1a4c8b301284f7afdf31c5cf10
--- /dev/null
+++ b/third_party/psutil/psutil/_psutil_posix.h
@@ -0,0 +1,15 @@
+/*
+ * $Id: _psutil_posix.h 1142 2011-10-05 18:45:49Z 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.
+ *
+ * POSIX specific module methods for _psutil_posix
+ */
+
+#include <Python.h>
+
+static PyObject* posix_getpriority(PyObject* self, PyObject* args);
+static PyObject* posix_setpriority(PyObject* self, PyObject* args);
+