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

third_party/psutil/psutil/_psutil_linux.h

Index: third_party/psutil/psutil/_psutil_linux.h
diff --git a/third_party/psutil/psutil/_psutil_linux.h b/third_party/psutil/psutil/_psutil_linux.h
new file mode 100644
index 0000000000000000000000000000000000000000..1dc36c80b08e662b2f62c1763ba7bf04c8cd698c
--- /dev/null
+++ b/third_party/psutil/psutil/_psutil_linux.h
@@ -0,0 +1,16 @@
+/*
+ * $Id: _psutil_linux.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.
+ *
+ * LINUX specific module methods for _psutil_linux
+ */
+
+#include <Python.h>
+
+static PyObject* linux_ioprio_get(PyObject* self, PyObject* args);
+static PyObject* linux_ioprio_set(PyObject* self, PyObject* args);
+static PyObject* get_disk_partitions(PyObject* self, PyObject* args);
+