Summary:
Update buckifier templates in the scripts.
Test plan (on devserver)
```
$python buckifier/buckify_rocksdb.py
```
Then
```
$git diff
```
Verify that generated TARGETS file is the same (except for indentation).
Pull Request resolved: https://github.com/facebook/rocksdb/pull/5647
Differential Revision: D16555647
Pulled By: riversand963
fbshipit-source-id: 32574a4d0e820858eab2391304dd731141719bcd