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/asl/default.nix

@@ -0,0 +1,53 @@
+{ lib
+, stdenv
+, fetchzip
+, buildDocs ? false, tex
+}:
+
+stdenv.mkDerivation rec {
+  pname = "asl";
+  version = "142-bld211";
+
+  src = fetchzip {
+    name = "${pname}-${version}";
+    url = "http://john.ccac.rwth-aachen.de:8000/ftp/as/source/c_version/asl-current-${version}.tar.bz2";
+    hash = "sha256-Sbm16JX7kC/7Ws7YgNBUXNqOCl6u+RXgfNjTODhCzSM=";
+  };
+
+  nativeBuildInputs = lib.optionals buildDocs [ tex ];
+
+  postPatch = lib.optionalString (!buildDocs) ''
+    substituteInPlace Makefile --replace "all: binaries docs" "all: binaries"
+  '';
+
+  dontConfigure = true;
+
+  preBuild = ''
+    bindir="${placeholder "out"}/bin" \
+    docdir="${placeholder "out"}/doc/asl" \
+    incdir="${placeholder "out"}/include/asl" \
+    libdir="${placeholder "out"}/lib/asl" \
+    mandir="${placeholder "out"}/share/man" \
+    substituteAll ${./Makefile-nixos.def} Makefile.def
+    mkdir -p .objdir
+  '';
+
+  meta = with lib; {
+    homepage = "http://john.ccac.rwth-aachen.de:8000/as/index.html";
+    description = "Portable macro cross assembler";
+    longDescription = ''
+      AS is a portable macro cross assembler for a variety of microprocessors
+      and -controllers. Though it is mainly targeted at embedded processors and
+      single-board computers, you also find CPU families in the target list that
+      are used in workstations and PCs.
+    '';
+    license = licenses.gpl2Plus;
+    maintainers = with maintainers; [ AndersonTorres ];
+    platforms = platforms.unix;
+  };
+}
+# TODO: multiple outputs
+# TODO: cross-compilation support
+# TODO: customize TeX input
+# TODO: report upstream about `mkdir -p .objdir/`
+# TODO: suggest upstream about building docs as an option