Add missing newline terminator on LogHeapCorruption

Change-Id: Ie62826406f6e72e1f5cf18d95b78051f70335e52
diff --git a/runtime/gc/verification.cc b/runtime/gc/verification.cc
index 5790755..195986f 100644
--- a/runtime/gc/verification.cc
+++ b/runtime/gc/verification.cc
@@ -86,7 +86,7 @@
   std::ostringstream oss;
   oss << "GC tried to mark invalid reference " << ref << std::endl;
   oss << DumpObjectInfo(ref, "ref") << "\n";
-  oss << DumpObjectInfo(holder.Ptr(), "holder");
+  oss << DumpObjectInfo(holder.Ptr(), "holder") << "\n";
   if (holder != nullptr) {
     mirror::Class* holder_klass = holder->GetClass<kVerifyNone, kWithoutReadBarrier>();
     if (IsValidClass(holder_klass)) {