[nfc][cxx-interop] Fix a few tests.

Author: zoecarver

test/Interop/Cxx/class/Inputs/type-classification.h

@@ -232,6 +232,7 @@ struct __attribute__((swift_attr("import_iterator"))) Iterator {
 };
 
 struct HasMethodThatReturnsIterator {
+  HasMethodThatReturnsIterator(const HasMethodThatReturnsIterator&);
   Iterator getIterator() const;
 };
 
@@ -240,6 +241,7 @@ struct IteratorBox {
 };
 
 struct HasMethodThatReturnsIteratorBox {
+  HasMethodThatReturnsIteratorBox(const HasMethodThatReturnsIteratorBox&);
   IteratorBox getIteratorBox() const;
 };
 

test/Interop/Cxx/stdlib/overlay/Inputs/custom-sequence.h

@@ -135,4 +135,4 @@ struct HasInheritedTemplatedConstIterator {
 typedef HasInheritedTemplatedConstIterator<int>
     HasInheritedTemplatedConstIteratorInt;
 
-#endif // TEST_INTEROP_CXX_STDLIB_INPUTS_CUSTOM_SEQUENCE_H
+#endif // TEST_INTEROP_CXX_STDLIB_INPUTS_CUSTOM_SEQUENCE_H