*: 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/miscutils/mountpoint.c b/miscutils/mountpoint.c
index a35c389..784c3cb 100644
--- a/miscutils/mountpoint.c
+++ b/miscutils/mountpoint.c
@@ -4,7 +4,7 @@
  *
  * Copyright (C) 2005 Bernhard Reutner-Fischer
  *
- * 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.
  *
  * Based on sysvinit's mountpoint
  */