Disable DBRangeDelTest::TailingIteratorRangeTombstoneUnsupported for ubsan

Summary:
UBSAN crashes when it run the test. Disabling it for UBSAN.
Closes https://github.com/facebook/rocksdb/pull/2427

Differential Revision: D5210897

Pulled By: yiwu-arbug

fbshipit-source-id: 2f5a876807c98d8db79ab9581965f7e6b29d4163

db/db_range_del_test.cc

@@ -791,6 +791,7 @@ TEST_F(DBRangeDelTest, IteratorIgnoresRangeDeletions) {
   db_->ReleaseSnapshot(snapshot);
 }
 
+#ifndef ROCKSDB_UBSAN_RUN
 TEST_F(DBRangeDelTest, TailingIteratorRangeTombstoneUnsupported) {
   db_->Put(WriteOptions(), "key", "val");
   // snapshot prevents key from being deleted during flush
@@ -817,6 +818,8 @@ TEST_F(DBRangeDelTest, TailingIteratorRangeTombstoneUnsupported) {
   }
   db_->ReleaseSnapshot(snapshot);
 }
+#endif  // !ROCKSDB_UBSAN_RUN
+
 #endif  // ROCKSDB_LITE
 
 }  // namespace rocksdb