openfpgaloader: add optional dependencies

This avoids the following missing features:

    hidapi-libusb not found: cmsis_dap support disabled
    zlib library not found: can't flash intel/altera devices

pkgs/development/embedded/fpga/openfpgaloader/default.nix

@@ -6,6 +6,8 @@
 , libftdi1
 , libusb1
 , udev
+, hidapi
+, zlib
 }:
 
 stdenv.mkDerivation rec {
@@ -25,6 +27,8 @@ stdenv.mkDerivation rec {
     libftdi1
     libusb1
     udev
+    hidapi
+    zlib
   ];
 
   meta = with lib; {