message: Fix conflicting struct/class forward definitions
diff: @@ -35,7 +35,7 @@ namespace swift {
  enum class IRGenDebugInfoKind : unsigned;
  class CanType;
  class IRGenOptions;
  -class PrintOptions;
  +struct PrintOptions;
  class SILModule;
  namespace irgen {
  class FixedTypeInfo;
  @@ -43,7 +43,7 @@ class TypeInfo;
  }
  }
  -class CachedMemberInfo;
  +struct CachedMemberInfo;
  class DWARFASTParser;
  class SwiftEnumDescriptor;
  