utilities/env_librados: copy use bufferlist::iterator (#6395)
Summary:
to adapt the change in ceph upstream where the bufferlist::copy() method
was removed in
https://github.com/ceph/ceph/commit/
c724369010a753bd44e11a534d1f42156c4fc12d
Signed-off-by: Kefu Chai <tchaikov@gmail.com>
Pull Request resolved: https://github.com/facebook/rocksdb/pull/6395
Differential Revision:
D19816815
Pulled By: zhichao-cao
fbshipit-source-id:
9210767b91af0ecdcf5dfaa3e70edcaeea55135f
(cherry picked from commit
debc4ef18b2e61581ca81dc7fc997b085eb015d9)