swift: Change erroneous 2015 copyright year to 2016

A thoughtless copy-and-paste has lead to the incorrect year on Swift
files.

Change-Id: I4ab74f21212ef3175ce03dfe58a21bedde1fb7ec
50 files changed
tree: c393f753329127386c62d87cb9bda3efaf522b7a
  1. clang/
  2. demo/
  3. lib/
  4. .gitignore