fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph

Wilfried Goesgens fbab9913e2 upgrade gtest 1.7.0 => 1.8.1 for json result writing ... Summary: Pull Request resolved: https://github.com/facebook/rocksdb/pull/5332 Differential Revision: D17242232 fbshipit-source-id: c0d4646556a1335e51ac7382b986ca7f6ced7b64		6 years ago
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gtest	upgrade gtest 1.7.0 => 1.8.1 for json result writing	6 years ago