Added copyright notice to the convenience E-ACSL script

src/plugins/e-acsl/scripts/e-acsl-gcc

+##########################################################################
+#                                                                        #
+#  This file is part of the Frama-C's E-ACSL plug-in.                    #
+#                                                                        #
+#  Copyright (C) 2012-2015                                               #
+#    CEA (Commissariat à l'énergie atomique et aux énergies              #
+#         alternatives)                                                  #
+#                                                                        #
+#  you can redistribute it and/or modify it under the terms of the GNU   #
+#  Lesser General Public License as published by the Free Software       #
+#  Foundation, version 2.1.                                              #
+#                                                                        #
+#  It is distributed in the hope that it will be useful,                 #
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of        #
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         #
+#  GNU Lesser General Public License for more details.                   #
+#                                                                        #
+#  See the GNU Lesser General Public License version 2.1                 #
+#  for more details (enclosed in the file license/LGPLv2.1).             #
+#                                                                        #
+##########################################################################
+
 #!/bin/sh -e
 
 # Convenience wrapper for small runs of E-ACSL Frama-C plugin