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/tools/misc/picocom/default.nix

@@ -0,0 +1,48 @@
+{ lib, stdenv
+, fetchFromGitHub
+, installShellFiles
+, lrzsz
+, IOKit
+}:
+
+stdenv.mkDerivation rec {
+  pname = "picocom";
+  # last tagged release is 3.1 but 3.2 is still considered a release
+  version = "3.2a";
+
+  # upstream is quiet as the original author is no longer active since March 2018
+  src = fetchFromGitHub {
+    owner = "npat-efault";
+    repo = "picocom";
+    rev = "1acf1ddabaf3576b4023c4f6f09c5a3e4b086fb8";
+    sha256 = "sha256-cs2bxqZfTbnY5d+VJ257C5hssaFvYup3tBKz68ROnAo=";
+  };
+
+  postPatch = ''
+    substituteInPlace Makefile \
+      --replace '.picocom_history' '.cache/picocom_history'
+
+    substituteInPlace picocom.c \
+      --replace '"rz -vv"' '"${lrzsz}/bin/rz -vv"' \
+      --replace '"sz -vv"' '"${lrzsz}/bin/sz -vv"'
+  '';
+
+  enableParallelBuilding = true;
+
+  nativeBuildInputs = [ installShellFiles ];
+
+  buildInputs = lib.optional stdenv.isDarwin IOKit;
+
+  installPhase = ''
+    install -Dm555 -t $out/bin picocom
+    installManPage picocom.1
+    installShellCompletion --bash bash_completion/picocom
+  '';
+
+  meta = with lib; {
+    description = "Minimal dumb-terminal emulation program";
+    homepage = "https://github.com/npat-efault/picocom/";
+    license = licenses.gpl2Plus;
+    platforms = platforms.unix;
+  };
+}