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/jwasm/default.nix

@@ -0,0 +1,43 @@
+{ lib
+, stdenv
+, fetchFromGitHub
+}:
+
+stdenv.mkDerivation rec {
+  pname = "jwasm";
+  version = "2.14";
+
+  src = fetchFromGitHub {
+    owner = "Baron-von-Riedesel";
+    repo  = "JWasm";
+    rev = "v${version}";
+    hash = "sha256-BUSsF73Q2vq6tF/YHMUyAmmFE/WWVQLRFJZkOD8T7f8=";
+  };
+
+  outputs = [ "out" "doc" ];
+
+  dontConfigure = true;
+
+  preBuild = ''
+    cp ${if stdenv.cc.isClang then "CLUnix.mak" else "GccUnix.mak"} Makefile
+    substituteInPlace Makefile \
+      --replace "/usr/local/bin" "${placeholder "out"}/bin"
+  '';
+
+  postInstall = ''
+    install -Dpm644 $src/Html/License.html \
+                    $src/Html/Manual.html \
+                    $src/Html/Readme.html \
+                    -t $doc/share/doc/jwasm/
+  '';
+
+  meta = with lib; {
+    broken = stdenv.isDarwin;
+    homepage = "https://github.com/Baron-von-Riedesel/JWasm/";
+    description = "A MASM-compatible x86 assembler";
+    license = licenses.gpl2Plus;
+    maintainers = with maintainers; [ AndersonTorres ];
+    platforms = platforms.unix;
+  };
+}
+# TODO: generalize for Windows builds