Squashed 'src/leveldb/' changes from 7d41e6f..20ca81f
Squashed 'src/leveldb/' changes from 7d41e6f..20ca81f

20ca81f Merge pull request #9
7aa105e leveldb: Win32WritableFile without memory mapping

git-subtree-dir: src/leveldb
git-subtree-split: 20ca81f08fb7fa108923a091668e447dcf5c6b9d

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