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/tools/backup/bakelite/default.nix

@@ -0,0 +1,34 @@
+{ lib, stdenv, fetchFromGitHub }:
+
+stdenv.mkDerivation rec {
+  pname = "bakelite";
+  version = "unstable-2022-02-12";
+
+  src = fetchFromGitHub {
+    owner = "richfelker";
+    repo = pname;
+    rev = "373901734d114e42aa385e6a7843745674e4ca08";
+    hash = "sha256-HBnYlUyTkvPTbdsZD02yCq5C7yXOHYK4l4mDRUkcN5I=";
+  };
+
+  hardeningEnable = [ "pie" ];
+  preBuild = ''
+    # pipe2() is only exposed with _GNU_SOURCE
+    # Upstream makefile explicitly uses -O3 to improve SHA-3 performance
+    makeFlagsArray+=( CFLAGS="-D_GNU_SOURCE -g -O3" )
+  '';
+
+  installPhase = ''
+    mkdir -p $out/bin
+    cp bakelite $out/bin
+  '';
+
+  meta = with lib; {
+    homepage = "https://github.com/richfelker/bakelite";
+    description = "Incremental backup with strong cryptographic confidentality";
+    license = licenses.gpl2;
+    maintainers = with maintainers; [ mvs ];
+    # no support for Darwin (yet: https://github.com/richfelker/bakelite/pull/5)
+    platforms = platforms.linux;
+  };
+}