Need to update rocksdb verison to fix new macos build issue

[waynenilsen]

Problem

I could not build using bin/setup on macos due to a rocksdb build issue.

error: declaration shadows a variable in namespace 'rocksdb'

diem/diem#168
facebook/rocksdb#5303

Solution

Need to get the maintainer of the rocksdb package to pull in the latest code (gitlab) and bump the version on hex. It has not been updated since Feb 9. Alternatively, fork and point to our fork of the rocksdb package. The license is Apache 2.

Testing

With a very new mac, try to run bin/setup it should not work.

> gcc --version
Apple clang version 11.0.3 (clang-1103.0.32.62)