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/desktops/plasma-5/kwallet-pam.nix

@@ -0,0 +1,21 @@
+{ mkDerivation, lib, extra-cmake-modules, pam, socat, libgcrypt, qtbase, kwallet, }:
+
+mkDerivation {
+  pname = "kwallet-pam";
+  nativeBuildInputs = [ extra-cmake-modules ];
+  buildInputs = [ pam socat libgcrypt qtbase kwallet ];
+  postPatch = ''
+    sed -i pam_kwallet_init -e "s|socat|${lib.getBin socat}/bin/socat|"
+  '';
+
+  # We get a crash when QT_PLUGIN_PATH is more than 1000 characters.
+  # pam_kwallet_init passes its environment to kwalletd5, but
+  # wrapQtApps gives our environment a huge QT_PLUGIN_PATH value. We
+  # are able to unset it here since kwalletd5 will have its own
+  # QT_PLUGIN_PATH.
+  postFixup = ''
+    wrapProgram $out/libexec/pam_kwallet_init --unset QT_PLUGIN_PATH
+  '';
+
+  dontWrapQtApps = true;
+}