Fixes linking for MSVC build.

Bug b/115344057

Change-Id: I9a38d987f0cf8c20c670ccdb1c38dd49681bb941
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/27968
Presubmit-Ready: Nicolas Capens <nicolascapens@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
Tested-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>