This fixes a few missing dependencies for the Chromium uses of
SwiftShader. It will allow us to turn on the 'gn check' in
Chromium.

Bug: angleproject:3876
Bug: b/140251624
Change-Id: I875a59701a4437cf94b503f6430d858a5285a961
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/35811Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Tested-by: Jamie Madill <jmadill@chromium.org>