This is for debugging, when ALLOW_DUMP=1.

Bug: b/130459196
Change-Id: I734d73b6996e4c3e53e38f65e47fa7f1b04bfe67
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/38869Reviewed-by: Ben Clayton <bclayton@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
Tested-by: Antonio Maiorano <amaiorano@google.com>