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/tools/misc/coreboot-toolchain/default.nix

@@ -0,0 +1,77 @@
+{ lib, callPackage }:
+let
+  common = arch: callPackage (
+    { bison
+    , callPackage
+    , curl
+    , fetchgit
+    , flex
+    , getopt
+    , git
+    , gnat11
+    , lib
+    , perl
+    , stdenvNoCC
+    , zlib
+    }:
+
+    stdenvNoCC.mkDerivation rec {
+      pname = "coreboot-toolchain-${arch}";
+      version = "4.16";
+
+      src = fetchgit {
+        url = "https://review.coreboot.org/coreboot";
+        rev = version;
+        sha256 = "073n8yid3v0l9wgwnrdqrlgzaj9mnhs33a007dgr7xq3z0iw3i52";
+        fetchSubmodules = false;
+        leaveDotGit = true;
+        postFetch = ''
+          patchShebangs $out/util/crossgcc/buildgcc
+          PATH=${lib.makeBinPath [ getopt ]}:$PATH $out/util/crossgcc/buildgcc -W > $out/.crossgcc_version
+          rm -rf $out/.git
+        '';
+      };
+
+      nativeBuildInputs = [ bison curl git perl ];
+      buildInputs = [ flex gnat11 zlib ];
+
+      enableParallelBuilding = true;
+      dontConfigure = true;
+      dontInstall = true;
+
+      postPatch = ''
+        mkdir -p util/crossgcc/tarballs
+
+        ${lib.concatMapStringsSep "\n" (
+          file: "ln -s ${file.archive} util/crossgcc/tarballs/${file.name}"
+          ) (callPackage ./stable.nix { })
+        }
+
+        patchShebangs util/genbuild_h/genbuild_h.sh
+      '';
+
+      buildPhase = ''
+        export CROSSGCC_VERSION=$(cat .crossgcc_version)
+        make crossgcc-${arch} CPUS=$NIX_BUILD_CORES DEST=$out
+      '';
+
+      meta = with lib; {
+        homepage = "https://www.coreboot.org";
+        description = "coreboot toolchain for ${arch} targets";
+        license = with licenses; [ bsd2 bsd3 gpl2 lgpl2Plus gpl3Plus ];
+        maintainers = with maintainers; [ felixsinger ];
+        platforms = platforms.linux;
+      };
+    }
+  );
+in
+
+lib.listToAttrs (map (arch: lib.nameValuePair arch (common arch {})) [
+  "i386"
+  "x64"
+  "arm"
+  "aarch64"
+  "riscv"
+  "ppc64"
+  "nds32le"
+])