Update copyright years for files generated by mktests.sh.

[Ralf Wildenhues]

OK?  In each of the added years, mktests.sh received at least one change
that was not just a copyright year bump.  Just barely.  ;-)

(This is obvious but I don't want to spoil release work.)

Thanks,
Ralf

    Update copyright years for files generated by mktests.sh.
    
    * tests/mktests.sh: Update copyright years for generated files.

diff --git a/tests/mktests.sh b/tests/mktests.sh
index 68667e4..fe59be2 100755
--- a/tests/mktests.sh
+++ b/tests/mktests.sh
@@ -205,8 +205,8 @@ do
     ## Do not edit by hand.  ##
     ## --------------------- ##
 
-    # Copyright (C) 2000, 2001, 2003, 2004, 2005, 2006, 2007 Free Software
-    # Foundation, Inc.
+    # Copyright (C) 2000, 2001, 2003, 2004, 2005, 2006, 2007, 2008, 2009
+    # 2010 Free Software Foundation, Inc.
 
     AT_BANNER([Testing autoconf/$base macros.])