Update Copyright Year in gdb, gdbserver and gdbreplay version output

This commit changes the copyright year printed by gdb, gdbserver
and gdbreplay when printing the tool's version.

gdb/top.c

@@ -1435,7 +1435,7 @@ print_gdb_version (struct ui_file *stream, bool interactive)
   /* Second line is a copyright notice.  */
 
   fprintf_filtered (stream,
-		    "Copyright (C) 2021 Free Software Foundation, Inc.\n");
+		    "Copyright (C) 2022 Free Software Foundation, Inc.\n");
 
   /* Following the copyright is a brief statement that the program is
      free software, that users are free to copy and change it on

gdbserver/gdbreplay.cc

@@ -405,7 +405,7 @@ static void
 gdbreplay_version (void)
 {
   printf ("GNU gdbreplay %s%s\n"
-	  "Copyright (C) 2021 Free Software Foundation, Inc.\n"
+	  "Copyright (C) 2022 Free Software Foundation, Inc.\n"
 	  "gdbreplay is free software, covered by "
 	  "the GNU General Public License.\n"
 	  "This gdbreplay was configured as \"%s\"\n",

gdbserver/server.cc

@@ -3479,7 +3479,7 @@ static void
 gdbserver_version (void)
 {
   printf ("GNU gdbserver %s%s\n"
-	  "Copyright (C) 2021 Free Software Foundation, Inc.\n"
+	  "Copyright (C) 2022 Free Software Foundation, Inc.\n"
 	  "gdbserver is free software, covered by the "
 	  "GNU General Public License.\n"
 	  "This gdbserver was configured as \"%s\"\n",