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/text/esh/default.nix

@@ -0,0 +1,40 @@
+{ lib, stdenv, fetchFromGitHub, asciidoctor, gawk, gnused, runtimeShell }:
+
+stdenv.mkDerivation rec {
+  pname = "esh";
+  version = "0.1.1";
+
+  src = fetchFromGitHub {
+    owner = "jirutka";
+    repo = "esh";
+    rev = "v${version}";
+    sha256 = "1ddaji5nplf1dyvgkrhqjy8m5djaycqcfhjv30yprj1avjymlj6w";
+  };
+
+  nativeBuildInputs = [ asciidoctor ];
+
+  buildInputs = [ gawk gnused ];
+
+  makeFlags = [ "prefix=$(out)" "DESTDIR=" ];
+
+  postPatch = ''
+    patchShebangs .
+    substituteInPlace esh \
+        --replace '"/bin/sh"' '"${runtimeShell}"' \
+        --replace '"awk"' '"${gawk}/bin/awk"' \
+        --replace 'sed' '${gnused}/bin/sed'
+    substituteInPlace tests/test-dump.exp \
+        --replace '#!/bin/sh' '#!${runtimeShell}'
+  '';
+
+  doCheck = true;
+  checkTarget = "test";
+
+  meta = with lib; {
+    description = "Simple templating engine based on shell";
+    homepage = "https://github.com/jirutka/esh";
+    license = licenses.mit;
+    maintainers = with maintainers; [ mnacamura ];
+    platforms = platforms.unix;
+  };
+}