anv: Add a version script to control exported symbols

As is done in the AMD driver.  The Intel Android driver needs this
when linking against the magma client library.

Run-All-Tests: True

Change-Id: I7ba095bc01bc73703ae761082b39b05eb832d3e5
Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/mesa/+/850376
Reviewed-by: John Bauman <jbauman@google.com>
2 files changed