Use a hardened stdenv by default

pkgs/development/libraries/libgphoto2/default.nix

@@ -14,6 +14,8 @@ stdenv.mkDerivation rec {
   # These are mentioned in the Requires line of libgphoto's pkg-config file.
   propagatedBuildInputs = [ libexif ];
 
+  noHardening_format = true;
+
   meta = {
     homepage = http://www.gphoto.org/proj/libgphoto2/;
     description = "A library for accessing digital cameras";