This holds the project include paths and defines, used by the C++ intellisense engine.

Change-Id: Ib87220cd49a38901167283316d4b549717516a0b
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/28068
Presubmit-Ready: Ben Clayton <bclayton@google.com>
Tested-by: Ben Clayton <bclayton@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>