minigbm: Remove (c) from copyright notice.

The pre-submit hook script checks that copyright messages don't
contain "(c)".

This CL removes "(c)" from all the copyrights header in minigbm
that still have it.

BUG=None
TEST=emerge-$BOARD minigbm.

Change-Id: I1922d9d29b78d124302d497310fe1c1cfd6fc695
Reviewed-on: https://chromium-review.googlesource.com/421588
Commit-Ready: David Reveman <[email protected]>
Commit-Ready: Daniele Castagna <[email protected]>
Tested-by: Daniele Castagna <[email protected]>
Reviewed-by: Gurchetan Singh <[email protected]>
diff --git a/i915.c b/i915.c
index 769e6a3..e74df47 100644
--- a/i915.c
+++ b/i915.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
+ * Copyright 2014 The Chromium OS Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */