*: make GNU licensing statement forms more regular

This change retains "or later" state! No licensing _changes_ here,
only form is adjusted (article, space between "GPL" and "v2" and so on).

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

applets/Kbuild.src

@@ -2,7 +2,7 @@
 #
 # Copyright (C) 1999-2005 by Erik Andersen <andersen@codepoet.org>
 #
-# Licensed under the GPL v2, see the file LICENSE in this tarball.
+# Licensed under GPLv2, see file LICENSE in this source tree.
 
 obj-y :=
 obj-y += applets.o

applets/applet_tables.c

@@ -5,7 +5,7 @@
  *
  * Copyright (C) 2007 Denys Vlasenko <vda.linux@googlemail.com>
  *
- * Licensed under GPLv2, see file LICENSE in this tarball for details.
+ * Licensed under GPLv2, see file LICENSE in this source tree.
  */
 
 #include <stdlib.h>

applets/applets.c

@@ -4,7 +4,7 @@
  *
  * Copyright (C) 2007 Denys Vlasenko <vda.linux@googlemail.com>
  *
- * Licensed under GPLv2, see file LICENSE in this tarball for details.
+ * Licensed under GPLv2, see file LICENSE in this source tree.
  */
 #include "busybox.h"
 

applets/individual.c

@@ -2,7 +2,7 @@
  *
  * Copyright 2005 Rob Landley <rob@landley.net
  *
- * Licensed under GPL version 2, see file LICENSE in this tarball for details
+ * Licensed under GPLv2, see file LICENSE in this source tree.
  */
 
 const char *applet_name;

applets/usage.c

@@ -2,7 +2,7 @@
 /*
  * Copyright (C) 2008 Denys Vlasenko.
  *
- * Licensed under GPLv2, see file LICENSE in this tarball for details.
+ * Licensed under GPLv2, see file LICENSE in this source tree.
  */
 #include <unistd.h>
 #include <stdlib.h>

applets/usage_pod.c

@@ -2,7 +2,7 @@
 /*
  * Copyright (C) 2009 Denys Vlasenko.
  *
- * Licensed under GPLv2, see file LICENSE in this tarball for details.
+ * Licensed under GPLv2, see file LICENSE in this source tree.
  */
 #include <unistd.h>
 #include <stdint.h>