swift

c0908160 - [ModuleInterfaces] Combine the normalized target triple into the cache hash

[ModuleInterfaces] Combine the normalized target triple into the cache hash Previously, we'd combine just the target architecture, and rely on the fact that the .swiftinterface is in a reasonably-target-specific subdirectory to include enough entropy to avoid hash collisions. But in the presence of a VFS or if two targets are sharing the same .swiftinterface file (which can sometimes happen in tests), they will collide since the hash only includes architecture. Instead, use the same normalization that the serialized module loader uses, and serialize the normalized target triple instead. Fixes rdar://55881335