Merge seastar upstream

* seastar 5da5d4e...a48fe69 (1):
  > backtrace: drop libwind in favor of libc backtrace()
This commit is contained in:
Avi Kivity
2018-05-23 14:42:14 +03:00
parent eed09dfdf9
commit 1f005fb434

Submodule seastar updated: 5da5d4eecb...a48fe69724