Update LICENSE

updated copyright year

Update LICENSE
1fb2ea88 · Alice Ferrazzi · GitHub · 59cdd6c6 · 1fb2ea88
--- a/LICENSE
+++ b/LICENSE
 The xv6 software is:
-Copyright (c) 2006-2016 Frans Kaashoek, Robert Morris, Russ Cox,
+Copyright (c) 2006-2017 Frans Kaashoek, Robert Morris, Russ Cox,
                        Massachusetts Institute of Technology
 Permission is hereby granted, free of charge, to any person obtaining