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/security/haveged/default.nix

@@ -0,0 +1,43 @@
+{ lib, stdenv, fetchFromGitHub }:
+
+stdenv.mkDerivation rec {
+  pname = "haveged";
+  version = "1.9.17";
+
+  src = fetchFromGitHub {
+    owner = "jirka-h";
+    repo = "haveged";
+    rev = "v${version}";
+    sha256 = "sha256-uVl+TZVMsf+9aRATQndYMK4l4JfOBvstd1O2nTHyMYU=";
+  };
+
+  strictDeps = true;
+
+  postPatch = ''
+    patchShebangs ent # test shebang
+  '';
+
+  installFlags = [
+    "sbindir=$(out)/bin" # no reason for us to have a $out/sbin, its just a symlink to $out/bin
+  ];
+
+  doCheck = true;
+
+  meta = with lib; {
+    description = "A simple entropy daemon";
+    longDescription = ''
+      The haveged project is an attempt to provide an easy-to-use, unpredictable
+      random number generator based upon an adaptation of the HAVEGE algorithm.
+      Haveged was created to remedy low-entropy conditions in the Linux random device
+      that can occur under some workloads, especially on headless servers. Current development
+      of haveged is directed towards improving overall reliability and adaptability while minimizing
+      the barriers to using haveged for other tasks.
+    '';
+    homepage = "https://github.com/jirka-h/haveged";
+    changelog = "https://raw.githubusercontent.com/jirka-h/haveged/v${version}/ChangeLog";
+    license = licenses.gpl3Plus;
+    maintainers = with maintainers; [ domenkozar ];
+    platforms = platforms.unix;
+    badPlatforms = platforms.darwin; # fails to build since v1.9.15
+  };
+}