package/libidn/Config.in: Fix layout of text as per coding guidelines.

Update description to match required ->
help
	Description
	Empty line
	Homepage

Signed-off-by: Daniel Laird <daniel.j.laird@nxp.com>

package/libidn/Config.in

@@ -1,7 +1,7 @@
 config BR2_PACKAGE_LIBIDN
 	bool "libidn"
 	help
-	  http://www.gnu.org/software/libidn/
 	  Libidn's purpose is to encode and decode internationalized 
 	  domain names. 
 
+	  http://www.gnu.org/software/libidn/