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/libgtkflow/default.nix

@@ -0,0 +1,39 @@
+{stdenv, lib, vala, meson, ninja, pkg-config, fetchFromGitea, gobject-introspection, glib, gtk3}:
+
+stdenv.mkDerivation rec {
+  pname = "libgtkflow";
+  version = "0.8.0";
+
+  src = fetchFromGitea {
+    domain = "notabug.org";
+    owner = "grindhold";
+    repo = pname;
+    rev = version;
+    hash = "sha256:1m30rvj5hx3b4cj8lbzrxv4j8lp3hx4jlb8vpf4rh46vc1rdkxpz";
+  };
+
+  nativeBuildInputs = [
+    vala
+    meson
+    ninja
+    pkg-config
+    gobject-introspection
+  ];
+
+  buildInputs = [
+    gtk3
+    glib
+  ];
+
+  mesonFlags = [
+    "-Denable_valadoc=true"
+  ];
+
+  meta = with lib; {
+    description = "Flow graph widget for GTK 3";
+    homepage = "https://notabug.org/grindhold/libgtkflow";
+    maintainers = with maintainers; [ grindhold ];
+    license = licenses.lgpl3Plus;
+    platforms = platforms.unix;
+  };
+}