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/openspin/default.nix

@@ -0,0 +1,26 @@
+{ lib, stdenv, fetchFromGitHub }:
+
+stdenv.mkDerivation {
+  pname = "openspin";
+  version = "unstable-2018-10-02";
+
+  src = fetchFromGitHub {
+    owner = "parallaxinc";
+    repo = "OpenSpin";
+    rev = "f3a587ed3e4f6a50b3c8d2022bbec5676afecedb";
+    sha256 = "1knkbzdanb60cwp7mggymkhd0167lh2sb1c00d1vhw7s0s1rj96n";
+  };
+
+  installPhase = ''
+    mkdir -p $out/bin
+    mv build/openspin $out/bin/openspin
+  '';
+
+  meta = with lib; {
+    description = "Compiler for SPIN/PASM languages for Parallax Propeller MCU";
+    homepage = "https://github.com/parallaxinc/OpenSpin";
+    license = licenses.mit;
+    maintainers = [ maintainers.redvers ];
+    platforms = platforms.all;
+  };
+}