swift

bf5073fd - ClangImporter: Update Swift for changes in clang (PCH + Modules issues)

ClangImporter: Update Swift for changes in clang (PCH + Modules issues) This sets the NeededByPCHOrCompilationUsesPCH language option when emitting a brigding PCH. rdar://problem/35056912 rdar://problem/30384801 Initial patch by Adrian Prantl (cherry picked from commit 5d5f542fe47668f80a4661ccccdb0048c9629a39) (cherry picked from commit fa2a5779b17f50260aeaad5d9c3c0062e99f07d2)