v2021.03.22.00

Updating submodules

Summary:
GitHub commits:

https://github.com/facebook/fbthrift/commit/a172b903d1d312cf8e9ef52d1faf25f1ccead55a
https://github.com/facebook/rocksdb/commit/7457c7cd00f936ee4e3d37a48811a73851bee182

Reviewed By: jurajh-fb

fbshipit-source-id: c413e44f1869f0e5175b12ad9ac4ae9422514f31