Use constant copyright year

for reproducible builds. The date chosen, 2017, matches the date in
rtcd.pl.

Change-Id: Ia6f1d62a2e26e3887a6a41a224726e5df2561d9e

build/cmake/rtcd.pl

diff --git a/build/cmake/rtcd.pl b/build/cmake/rtcd.pl
index ba19761..10f6597 100755
--- a/build/cmake/rtcd.pl
+++ b/build/cmake/rtcd.pl
@@ -221,11 +221,9 @@
 #
 sub common_top() {
   my $include_guard = uc($opts{sym})."_H_";
-  my @time = localtime;
-  my $year = $time[5] + 1900;
   print <<EOF;
 /*
- * Copyright (c) ${year}, Alliance for Open Media. All rights reserved.
+ * Copyright (c) 2017, Alliance for Open Media. All rights reserved.
  *
  * This source code is subject to the terms of the BSD 2 Clause License and
  * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License