Make unittests work in component build

src/machine-type.h

Index: src/machine-type.h
diff --git a/src/machine-type.h b/src/machine-type.h
index e9605d7280fbdd28bb53292092ef97130cae4d0c..975b93a41647d1dc3c899c9cd65cfed42c3039ad 100644
--- a/src/machine-type.h
+++ b/src/machine-type.h
@@ -223,7 +223,7 @@ V8_INLINE size_t hash_value(MachineType type) {
 V8_EXPORT_PRIVATE std::ostream& operator<<(std::ostream& os,
                                            MachineRepresentation rep);
 std::ostream& operator<<(std::ostream& os, MachineSemantic type);
-std::ostream& operator<<(std::ostream& os, MachineType type);
+V8_EXPORT_PRIVATE std::ostream& operator<<(std::ostream& os, MachineType type);
 
 inline bool IsFloatingPoint(MachineRepresentation rep) {
   return rep >= MachineRepresentation::kFirstFPRepresentation;