[PATCH libinput] filter: add Simon's copyright

[Peter Hutterer]

This code was largely lifted from the X server in
bb25b2ad297891430606c367bfabc but didn't take the copyright messages that
applied to that code.

Signed-off-by: Peter Hutterer <peter.hutterer at who-t.net>
---
Simon: I think that should cover it. Sorry about that, it was certainly not
intentional. Let me know if that covers it or if you think there's something
else missing.

 COPYING      | 1 +
 src/filter.c | 1 +
 2 files changed, 2 insertions(+)

diff --git a/COPYING b/COPYING
index 8bbb3c3..efc1a94 100644
--- a/COPYING
+++ b/COPYING
@@ -1,3 +1,4 @@
+Copyright © 2006-2009 Simon Thum
 Copyright © 2008-2012 Kristian Høgsberg
 Copyright © 2010-2012 Intel Corporation
 Copyright © 2010-2011 Benjamin Franzke
diff --git a/src/filter.c b/src/filter.c
index b953bee..626cb0a 100644
--- a/src/filter.c
+++ b/src/filter.c
@@ -1,4 +1,5 @@
 /*
+ * Copyright © 2006-2009 Simon Thum
  * Copyright © 2012 Jonas Ådahl
  *
  * Permission to use, copy, modify, distribute, and sell this software and
-- 
2.3.5