Add CHERI+RVFI_DII grant codes and copyrights

src_Core/Core/TV_Encode.bsv

@@ -1,4 +1,17 @@
 // Copyright (c) 2013-2020 Bluespec, Inc. All Rights Reserved.
+//
+//-
+// RVFI_DII + CHERI modifications:
+//     Copyright (c) 2020 Jonathan Woodruff
+//     All rights reserved.
+//
+//     This software was developed by SRI International and the University of
+//     Cambridge Computer Laboratory (Department of Computer Science and
+//     Technology) under DARPA contract HR0011-18-C-0016 ("ECATS"), as part of the
+//     DARPA SSITH research programme.
+//
+//     This work was supported by NCSC programme grant 4212611/RFA 15971 ("SafeBet").
+//-
 
 package TV_Encode;