*: 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>
diff --git a/networking/libiproute/Kbuild.src b/networking/libiproute/Kbuild.src
index b0aa50a..7c78f3c 100644
--- a/networking/libiproute/Kbuild.src
+++ b/networking/libiproute/Kbuild.src
@@ -2,7 +2,7 @@
 #
 # Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
 #
-# Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
+# Licensed under GPLv2 or later, see file LICENSE in this source tree.
 #
 
 lib-y:=