opencv: turn off bindnow and relro hardening

pkgs/development/libraries/opencv/default.nix

@@ -20,6 +20,9 @@ stdenv.mkDerivation rec {
 
   enableParallelBuilding = true;
 
+  hardening_bindnow = false;
+  hardening_relro = false;
+
   meta = {
     description = "Open Computer Vision Library with more than 500 algorithms";
     homepage = http://opencv.org/;