add comment about version

package/samba/Makefile

@@ -7,7 +7,7 @@ PKG_NAME:=		samba
 PKG_VERSION:=		4.2.1
 PKG_RELEASE:=		4
 PKG_HASH:=		37eaa239c116dc2c22c29c5a2931eb178ed22e48b594687247446703119b4ac3
-PKG_DESCR:=		file and print server
+PKG_DESCR:=		file and print server (version 4)
 PKG_SECTION:=		net/fs
 PKG_BUILDDEP:=		gettext-tiny util-linux popt python2 gnutls
 PKG_BUILDDEP:=		heimdal-host python2-host