[snapshot] Fix the Memory.json benchmark again

In non-object-print builds, we were missing a trailing newline int
tracing output, messing up Memory.json parsing.

Tbr: machenbach@chromium.org
Change-Id: Ic826a4e20e348be6687c4981b48e6ab094f470ce
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2857955Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74264}

src/snapshot/serializer.cc

@@ -98,9 +98,9 @@ void Serializer::OutputStatistics(const char* name) {
   }
   INSTANCE_TYPE_LIST(PRINT_INSTANCE_TYPE)
 #undef PRINT_INSTANCE_TYPE
+#endif  // OBJECT_PRINT
 
   PrintF("\n");
-#endif  // OBJECT_PRINT
 }
 
 void Serializer::SerializeDeferredObjects() {