Added the copyright back

Author: sataei

compiler/tests/21_lef_sram_test.py

@@ -1,3 +1,9 @@
+# BSD 3-Clause License (See LICENSE.OR for licensing information)
+# Copyright (c) 2016-2019 Regents of the University of California 
+# and The Board of Regents for the Oklahoma Agricultural and 
+# Mechanical College (acting for and on behalf of Oklahoma State University)
+# All rights reserved.
+
 """ Generate the LEF file for an SRAM. """
 
 import unittest