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/bash/nix-bash-completions/default.nix

@@ -0,0 +1,43 @@
+{ lib, stdenv, fetchFromGitHub }:
+
+stdenv.mkDerivation rec {
+  version = "0.6.8";
+  pname = "nix-bash-completions";
+
+  src = fetchFromGitHub {
+    owner = "hedning";
+    repo = "nix-bash-completions";
+    rev = "v${version}";
+    sha256 = "1n5zs6xcnv4bv1hdaypmz7fv4j7dsr4a0ifah99iyj4p5j85i1bc";
+  };
+
+  strictDeps = true;
+  # To enable lazy loading via. bash-completion we need a symlink to the script
+  # from every command name.
+  installPhase = ''
+    runHook preInstall
+
+    commands=$(
+      function complete() { shift 2; echo "$@"; }
+      shopt -s extglob
+      source _nix
+    )
+    install -Dm444 -t $out/share/bash-completion/completions _nix
+    cd $out/share/bash-completion/completions
+    for c in $commands; do
+      ln -s _nix $c
+    done
+
+    runHook postInstall
+  '';
+
+  meta = with lib; {
+    homepage = "https://github.com/hedning/nix-bash-completions";
+    description = "Bash completions for Nix, NixOS, and NixOps";
+    license = licenses.bsd3;
+    platforms = platforms.all;
+    maintainers = with maintainers; [ hedning ];
+    # Set a lower priority such that the newly provided completion from Nix 2.4 are preferred.
+    priority = 10;
+  };
+}