extend/ENV/super: use brew libs for some Python packages

This avoids using bundled libraries for:

* `hidapi`[^1]
* `pynacl`[^2]

The build should now fail if dependency is missing.

[^1]: https://github.com/trezor/cython-hidapi/blob/0.14.0.post2/setup.py#L229
[^2]: https://github.com/pyca/pynacl/blob/1.5.0/setup.py#L71-L73

Library/Homebrew/extend/ENV/super.rb

@@ -93,6 +93,10 @@ def setup_build_environment(formula: nil, cc: nil, build_bottle: false, bottle_a
     # Prevent Go from automatically downloading a newer toolchain than the one that we have.
     # https://tip.golang.org/doc/toolchain
     self["GOTOOLCHAIN"] = "local"
+    # Prevent Python packages from using bundled libraries.
+    # Currently for hidapi and pynacl
+    self["HIDAPI_SYSTEM_HIDAPI"] = "1"
+    self["SODIUM_INSTALL"] = "system"
 
     set_debug_symbols if debug_symbols