top-level: Add more options to release-cross.nix, normalize param comments

pkgs/top-level/release-cross.nix

@@ -1,4 +1,12 @@
-with import ./release-lib.nix { supportedSystems = [ builtins.currentSystem ]; };
+
+{ # The platforms for which we build Nixpkgs.
+  supportedSystems ? [ builtins.currentSystem ]
+, # Strip most of attributes when evaluating to spare memory usage
+  scrubJobs ? true
+}:
+
+with import ./release-lib.nix { inherit supportedSystems scrubJobs; };
+
 let
   lib = import ../../lib;
 

pkgs/top-level/release.nix

@@ -11,10 +11,10 @@
 
 { nixpkgs ? { outPath = (import ../.. {}).lib.cleanSource ../..; revCount = 1234; shortRev = "abcdef"; }
 , officialRelease ? false
-# The platforms for which we build Nixpkgs.
-, supportedSystems ? [ "x86_64-linux" "i686-linux" "x86_64-darwin" ]
-# Strip most of attributes when evaluating to spare memory usage
-, scrubJobs ? true
+, # The platforms for which we build Nixpkgs.
+  supportedSystems ? [ "x86_64-linux" "i686-linux" "x86_64-darwin" ]
+, # Strip most of attributes when evaluating to spare memory usage
+  scrubJobs ? true
 }:
 
 with import ./release-lib.nix { inherit supportedSystems scrubJobs; };