[fuchsia] Suppress non-hermetic action

`mesa_python_stdout_to_file_action` calls user-specified custom python
scripts which can import other libraries without specifying them in
sources.

This should unblock us from fixing non-hermetic python actions in-tree,
we'll come back to fix this afterwards.

Change-Id: I86feb9b23319cd64a767719de1cb2e2a8de4398d
Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/mesa/+/494000
Reviewed-by: Anirudh Mathukumilli <rudymathu@google.com>
1 file changed