The STANDALONE preprocessor macro is only for controlling the loading of
a delay loaded DLL, on Windows.

Change-Id: Ife765f27c7e03c542d7e81d90c09c97e4e2cbe5d
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/33248
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
Tested-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>