Should speed up the build a little.

Also removes Minimal Rebuild. It has been deprecated:
https://docs.microsoft.com/en-us/cpp/build/reference/gm-enable-minimal-rebuild?view=vs-2019

Bug b/129772660

Change-Id: I44622edc2fc88ca6b2b6bcb6a515d1e3326d3dbd
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/28769
Presubmit-Ready: Nicolas Capens <nicolascapens@google.com>
Tested-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>