[Explicit Modules] Handle re-mapped platform versions when specifying SDK-aligned `-clang-target` on Darwin platforms#1394

artemcm merged 1 commit intoswiftlang:mainswiftlang/swift-driver:mainfrom

artemcm:RobustExplicitModuleClangTargetRemapartemcm/swift-driver:RobustExplicitModuleClangTargetRemapCopy head branch name to clipboard