scripts/coccinelle/free/ifnullfree.cocci: add copyright information

All coccinelle scripts have a copyright in the header.

Signed-off-by: Fabian Frederick <fabf@skynet.be>
Suggested-by: Julia Lawall <Julia.Lawall@lip6.fr>
Acked-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

scripts/coccinelle/free/ifnullfree.cocci

@@ -4,8 +4,9 @@
 /// "kfree(NULL) is safe this check is probably not required"
 /// and kfreeaddr.cocci by Julia Lawall.
 ///
-/// Comments: -
-/// Options: --no-includes --include-headers
+// Copyright: (C) 2014 Fabian Frederick.  GPLv2.
+// Comments: -
+// Options: --no-includes --include-headers
 
 virtual patch
 virtual org