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/shells/mrsh/default.nix

@@ -0,0 +1,31 @@
+{ lib, stdenv, fetchFromGitHub, meson, ninja, pkg-config, readline }:
+
+stdenv.mkDerivation rec {
+  pname = "mrsh-unstable";
+  version = "2021-01-10";
+
+  src = fetchFromGitHub {
+    owner = "emersion";
+    repo = "mrsh";
+    rev = "9f9884083831ea1f94bdda5151c5df3888932849";
+    sha256 = "0vvdwzw3fq74lwgmy6xxkk01sd68fzhsw84c750lm1dma22xhjci";
+  };
+
+  strictDeps = true;
+  nativeBuildInputs = [ meson ninja pkg-config ];
+  buildInputs = [ readline ];
+
+  doCheck = true;
+
+  meta = with lib; {
+    description = "A minimal POSIX shell";
+    homepage = "https://mrsh.sh";
+    license = licenses.mit;
+    maintainers = with maintainers; [ matthiasbeyer ];
+    platforms = platforms.unix;
+  };
+
+  passthru = {
+    shellPath = "/bin/mrsh";
+  };
+}