zeroad: make sure hydra builds zeroad-unwrapped

Hydra hasn't built zeroad since the 0.0.24 bump:
https://hydra.nixos.org/job/nixos/trunk-combined/nixpkgs.zeroad.x86_64-linux/all
This is due to the data package becoming larger than the output
limit. Even though the data package is already marked with
`hydraPlatforms = [];`, hydra still tried to build it, since it is a
dependency of `zeroad`. This makes it so `zeroad` isn't built by hydra
either. Only `zeroad-unwrapped` (which takes significant compilation
time) will be built by hydra.

pkgs/games/0ad/wrapper.nix

@@ -4,7 +4,6 @@ assert zeroad-unwrapped.version == zeroad-data.version;
 
 buildEnv {
   name = "zeroad-${zeroad-unwrapped.version}";
-  inherit (zeroad-unwrapped) meta;
 
   nativeBuildInputs = [ makeWrapper ];
 
@@ -18,4 +17,8 @@ buildEnv {
         --set ZEROAD_ROOTDIR "$out/share/0ad"
     done
   '';
+
+  meta = zeroad-unwrapped.meta // {
+    hydraPlatforms = [];
+  };
 }

pkgs/top-level/all-packages.nix

@@ -30009,9 +30009,9 @@ with pkgs;
 
   keen4 = callPackage ../games/keen4 { };
 
-  zeroadPackages = dontRecurseIntoAttrs (callPackage ../games/0ad {
+  zeroadPackages = callPackage ../games/0ad {
     wxGTK = wxGTK31;
-  });
+  };
 
   zeroad = zeroadPackages.zeroad;