meson_to_hermetic: fixes for freedreno build

Bug:498342735
Change-Id: I40f0db5191a1fae5d50c22ffcc3980dbc5c185a3
Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/mesa/+/1593567
Reviewed-by: David Gilhooley <dgilhooley@google.com>
7 files changed