treewide: Add lots of platforms to packages with no meta

Build-tested on x86_64 Linux and on Darwin.

pkgs/development/libraries/java/hydra-ant-logger/default.nix

@@ -18,4 +18,8 @@ stdenv.mkDerivation rec {
     mkdir -p $out/share/java
     cp -v *.jar $out/share/java
   '';
+
+  meta = {
+    platforms = stdenv.lib.platforms.unix;
+  };
 }