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/rasm/default.nix

@@ -0,0 +1,33 @@
+{ lib, stdenv, fetchurl, unzip }:
+
+stdenv.mkDerivation rec {
+  pname = "rasm";
+  version = "0.117";
+
+  src = fetchurl {
+    url = "http://www.roudoudou.com/export/cpc/rasm/${pname}_v0117_src.zip";
+    sha256 = "1hwily4cfays59qm7qd1ax48i7cpbxhs5l9mfpyn7m2lxsfqrl3z";
+  };
+
+  sourceRoot = ".";
+
+  nativeBuildInputs = [ unzip ];
+
+  buildPhase = ''
+      # according to official documentation
+      ${stdenv.cc.targetPrefix}cc rasm_v*.c -O2 -lm -o rasm
+  '';
+
+  installPhase = ''
+    install -Dt $out/bin rasm
+  '';
+
+  meta = with lib; {
+    homepage = "http://www.roudoudou.com/rasm/";
+    description = "Z80 assembler";
+    # use -n option to display all licenses
+    license = licenses.mit; # expat version
+    maintainers = [ ];
+    platforms = platforms.all;
+  };
+}