leveldb_ttl

atdalīts no building_data_management_systems.Xuanzhou.2024Fall.DaSE/leveldb_base

作者：韩晨旭 10225101440 李畅 10225102463

costan 739c25100e Add CMake build support. Fixes https://github.com/google/leveldb/issues/466 ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=189425354			pirms 7 gadiem
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memenv	Add CMake build support.	删除	pirms 7 gadiem