[Swift CI] Build Failure: 0. OSS - Swift Incremental RA - OS X (master) #11974

# [FAILURE] oss-swift-incremental-RA-osx [#11974]

Build URL: https://ci.swift.org/job/oss-swift-incremental-RA-osx/11974/
Project: oss-swift-incremental-RA-osx
Date of build: Tue, 09 Jun 2020 13:02:58 -0500
Build duration: 1 hr 40 min

Changes- Commit 668f3e6381c94aec2a01fc7a4bdefcc6f4369444 by erik.pilkington:

[ObjC] Fix AST serialization for pseudo-strong parameters

  • add: clang/test/PCH/externally-retained.m

  • edit: clang/lib/Serialization/ASTWriterDecl.cpp

  • Commit cf5106661de42e6d30833e73a446f2e43d297c94 by achikin:

    [Explicit Module Builds] Do not add the .modulemap file to the build

    • edit: Sources/SwiftDriver/Dependency Scanning/ModuleDependencyBuildGeneration.swift