swift

de7ab4cc - [Dependency Scanning] Disable validation of Swift dependency modules' existing pre-built candidate binary module files in the scanner, on a non-caching build.

[Dependency Scanning] Disable validation of Swift dependency modules' existing pre-built candidate binary module files in the scanner, on a non-caching build. As-is, this default interferes with the incremental build machinery which conservatively assumes that binary module dependencies must cause dependents to be re-built.