haskellPackages.hadoop-rpc: Apply stack overflow patch on 8.4 as well.

pkgs/development/haskell-modules/configuration-ghc-8.4.x.nix

···
   xmobar = super.xmobar.overrideScope (self: super: { hinotify = self.hinotify_0_3_9; });
   hinotify_0_3_9 = dontCheck (doJailbreak super.hinotify_0_3_9); # allow async 2.2.x
 
+  # Reduction stack overflow; size = 38
+  # https://github.com/jystic/hadoop-tools/issues/31
+  hadoop-rpc =
+    let patch = pkgs.fetchpatch
+          { url = https://github.com/shlevy/hadoop-tools/commit/f03a46cd15ce3796932c3382e48bcbb04a6ee102.patch;
+            sha256 = "09ls54zy6gx84fmzwgvx18ssgm740cwq6ds70p0p125phi54agcp";
+            stripLen = 1;
+          };
+    in appendPatch super.hadoop-rpc patch;
+
 }