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/hotpatch/default.nix

@@ -0,0 +1,37 @@
+{ lib, stdenv, fetchFromGitHub, cmake }:
+
+stdenv.mkDerivation rec {
+  pname = "hotpatch";
+  version = "0.2";
+
+  src = fetchFromGitHub {
+    owner = "vikasnkumar";
+    repo = "hotpatch";
+    rev = "4b65e3f275739ea5aa798d4ad083c4cb10e29149";
+    sha256 = "169vdh55wsbn6fl58lpzqx64v6ifzh7krykav33x1d9hsk98qjqh";
+  };
+
+  doCheck = true;
+
+  nativeBuildInputs = [ cmake ];
+
+  preConfigure = ''
+    substituteInPlace test/loader.c \
+      --replace \"/lib64/ld-linux-x86-64.so.2 \""$(cat $NIX_CC/nix-support/dynamic-linker)" \
+      --replace \"/lib/ld-linux-x86-64.so.2 \""$(cat $NIX_CC/nix-support/dynamic-linker)" \
+      --replace \"/lib/ld-linux.so.2 \""$(cat $NIX_CC/nix-support/dynamic-linker)" \
+      --replace \"/lib32/ld-linux.so.2 \""$(cat $NIX_CC/nix-support/dynamic-linker)"
+  '';
+
+  checkPhase = ''
+    LD_LIBRARY_PATH=$(pwd)/src make test
+  '';
+
+  meta = with lib; {
+    description = "Hot patching executables on Linux using .so file injection";
+    homepage = src.meta.homepage;
+    license = licenses.bsd3;
+    maintainers = [ ];
+    platforms = ["i686-linux" "x86_64-linux"];
+  };
+}