uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/development/compilers/xa/dxa.nix

@@ -0,0 +1,43 @@
+{ lib
+, stdenv
+, fetchurl
+, installShellFiles
+}:
+
+stdenv.mkDerivation rec {
+  pname = "dxa";
+  version = "0.1.4";
+
+  src = fetchurl {
+    urls = [
+      "https://www.floodgap.com/retrotech/xa/dists/${pname}-${version}.tar.gz"
+      "https://www.floodgap.com/retrotech/xa/dists/unsupported/${pname}-${version}.tar.gz"
+    ];
+    hash = "sha256-C0rgwK51Ij9EZCm9GeiVnWIkEkse0d60ok8G9hm2a5U=";
+  };
+
+  nativeBuildInputs = [ installShellFiles ];
+
+  dontConfigure = true;
+
+  postPatch = ''
+    substituteInPlace Makefile \
+      --replace "CC = gcc" "CC = ${stdenv.cc.targetPrefix}cc"
+  '';
+
+  installPhase = ''
+    runHook preInstall
+    install -d $out/bin/
+    install dxa $out/bin/
+    installManPage dxa.1
+    runHook postInstall
+  '';
+
+  meta = with lib; {
+    homepage = "https://www.floodgap.com/retrotech/xa/";
+    description = "Andre Fachat's open-source 6502 disassembler";
+    license = licenses.gpl2Plus;
+    maintainers = with maintainers; [ AndersonTorres ];
+    platforms = with platforms; unix;
+  };
+}