Add additional required files as listed in chromium:961729.

Bug: chromium:961729
Change-Id: Ifbbab3e14fc6e243ada9c6b4c43e8a70971d9a72
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/31114
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
Tested-by: Ben Clayton <bclayton@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>