findutils: Fixed up LICENSE information.

Also cleaned some whitespace.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

utils/findutils/Makefile

@@ -1,4 +1,4 @@
-# 
+#
 # Copyright (C) 2006-2016 OpenWrt.org
 #
 # This is free software, licensed under the GNU General Public License v2.
@@ -10,12 +10,13 @@ PKG_NAME:=findutils
 PKG_VERSION:=4.6.0
 PKG_RELEASE:=3
 
-PKG_LICENSE:=GPL-3.0+
-
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=@GNU/$(PKG_NAME)
 PKG_HASH:=ded4c9f73731cd48fec3b6bdaccce896473b6d8e337e9612e16cf1431bb1169d
+
 PKG_MAINTAINER:=Daniel Dickinson <cshored@thecshore.com>
+PKG_LICENSE:=GPL-3.0-or-later
+PKG_LICENSE_FILES:=COPYING
 
 PKG_BUILD_PARALLEL:=1
 PKG_INSTALL:=1