Add the D3D9 project to the solution.

Bug 22533227

Change-Id: I7dd953eecb169cb471aa9c1830f91b06f8bcc7ac
Reviewed-on: https://swiftshader-review.googlesource.com/3731
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>