Fix build with later WDKs

Fix build with later WDKs

- Adds alias for GetProjectInfoForReference target to version.vcxproj
  Later kits seemed to have renamed the build target, and will fail without
  this alias target.

- Adds "/fd sha256" to signtool command line
  WDK 20344 and later require binaries signed with a SHA256 file digest, or
  the build outputs are deleted

- Squashes warning 4061 to avoid bogus noise.

Signed-off-by: Paul Durrant <pdurrant@amazon.com>