deno: mark x86 darwin broken

Aligned_alloc error that can't be fixed until SDK refactor work is done
to allow overriding SDK in rust toolchain.

pkgs/by-name/de/deno/package.nix

@@ -111,5 +111,8 @@ rustPlatform.buildRustPackage rec {
       "x86_64-darwin"
       "aarch64-darwin"
     ];
+    # NOTE: `aligned_alloc` error on darwin SDK < 10.15. Can't do usual overrideSDK with rust toolchain in current implementation.
+    # Should be fixed with darwin SDK refactor and can be revisited.
+    broken = stdenv.isDarwin && stdenv.isx86_64;
   };
 }