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/libraries/libksba/default.nix

@@ -0,0 +1,33 @@
+{ buildPackages, lib, stdenv, fetchurl, gettext, libgpg-error }:
+
+stdenv.mkDerivation rec {
+  pname = "libksba";
+  version = "1.6.0";
+
+  src = fetchurl {
+    url = "mirror://gnupg/libksba/libksba-${version}.tar.bz2";
+    sha256 = "sha256-2taD5vLZFdiAqkvtXOqaEVaQuJNbeKG74BZpGJMHpIs=";
+  };
+
+  outputs = [ "out" "dev" "info" ];
+
+  buildInputs = [ gettext ];
+  propagatedBuildInputs = [ libgpg-error ];
+  depsBuildBuild = [ buildPackages.stdenv.cc ];
+
+  configureFlags = [ "--with-libgpg-error-prefix=${libgpg-error.dev}" ];
+
+  postInstall = ''
+    mkdir -p $dev/bin
+    mv $out/bin/*-config $dev/bin/
+    rmdir --ignore-fail-on-non-empty $out/bin
+  '';
+
+  meta = with lib; {
+    homepage = "https://www.gnupg.org";
+    description = "CMS and X.509 access library";
+    platforms = platforms.all;
+    maintainers = with maintainers; [ ];
+    license = licenses.lgpl3;
+  };
+}