Add version attribute where maintainers |= nckx

This will probably be mandatory soon, and is a step in the right
direction. Removes the deprecated meta.version, and move some meta
sections to the end of the file where I should have put them in
the first place.

pkgs/os-specific/linux/mcelog/default.nix

@@ -1,8 +1,8 @@
 { stdenv, fetchFromGitHub }:
 
-let version = "129"; in
-stdenv.mkDerivation {
+stdenv.mkDerivation rec {
   name = "mcelog-${version}";
+  version = "129";
 
   src = fetchFromGitHub {
     sha256 = "143xh5zvgax88yhg6mg6img64nrda85yybf76fgsk7a8gc57ghyk";
@@ -25,7 +25,6 @@ stdenv.mkDerivation {
   installFlags = [ "DESTDIR=$(out)" "prefix=" "DOCDIR=/share/doc" ];
 
   meta = with stdenv.lib; {
-    inherit version;
     description = "Log x86 machine checks: memory, IO, and CPU hardware errors";
     longDescription = ''
       The mcelog daemon accounts memory and some other errors in various ways