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/mlton/from-git-source.nix

@@ -0,0 +1,43 @@
+{ fetchgit
+, gmp
+, mltonBootstrap
+, url ? "https://github.com/mlton/mlton"
+, rev
+, sha256
+, stdenv
+, version
+, which
+}:
+
+stdenv.mkDerivation {
+  pname = "mlton";
+  inherit version;
+
+  src = fetchgit {
+    inherit url rev sha256;
+  };
+
+  nativeBuildInputs = [ which ];
+
+  buildInputs = [mltonBootstrap gmp];
+
+  # build fails otherwise
+  enableParallelBuilding = false;
+
+  preBuild = ''
+    find . -type f | grep -v -e '\.tgz''$' | xargs sed -i "s@/usr/bin/env bash@$(type -p bash)@"
+    sed -i "s|/tmp|$TMPDIR|" bin/regression
+
+    makeFlagsArray=(
+      MLTON_VERSION="${version} ${rev}"
+      CC="$(type -p cc)"
+      PREFIX="$out"
+      WITH_GMP_INC_DIR="${gmp.dev}/include"
+      WITH_GMP_LIB_DIR="${gmp}/lib"
+      )
+  '';
+
+  doCheck = true;
+
+  meta = import ./meta.nix;
+}