[magma] Fixes for android build with magma backend

Run-All-Tests: True

Change-Id: I8b78d23a713777c3bf48b75f1ad32773ef0c7ce2
Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/mesa/+/795888
Reviewed-by: John Bauman <jbauman@google.com>
4 files changed