Add tinycrypt 0.2.8

Signed-off-by: Fabio Utzig <utzig@apache.org>
diff --git a/ext/tinycrypt/lib/Makefile b/ext/tinycrypt/lib/Makefile
index ee831e8..9c4d8e2 100644
--- a/ext/tinycrypt/lib/Makefile
+++ b/ext/tinycrypt/lib/Makefile
@@ -1,8 +1,8 @@
 ################################################################################
 #
-#      Copyright (C) 2015 by Intel Corporation, All Rights Reserved.
+#      Copyright (C) 2017 by Intel Corporation, All Rights Reserved.
 #
-# 								   Cryptographic Primitives Makefile.
+# 			Cryptographic Primitives Makefile.
 #
 ################################################################################