Send holder to Mark in ConcurrentCopying::Process for GC verification

Aims to log more when heap corruption is detected.

Test: test-art-host-gtest-verification_test
Test: test-art-host

Bug: 38409177
Change-Id: I6dd1872a707e384ae8b8cb16ec0845852a5dc183
diff --git a/runtime/gc/verification.cc b/runtime/gc/verification.cc
index 7b31c8a..c14f250 100644
--- a/runtime/gc/verification.cc
+++ b/runtime/gc/verification.cc
@@ -86,8 +86,8 @@
   std::ostringstream oss;
   oss << "GC tried to mark invalid reference " << ref << std::endl;
   oss << DumpObjectInfo(ref, "ref") << "\n";
+  oss << DumpObjectInfo(holder.Ptr(), "holder");
   if (holder != nullptr) {
-    oss << DumpObjectInfo(holder.Ptr(), "holder");
     mirror::Class* holder_klass = holder->GetClass<kVerifyNone, kWithoutReadBarrier>();
     if (IsValidClass(holder_klass)) {
       oss << "field_offset=" << offset.Uint32Value();