Auto merge of #5223 - matthiaskrgr:manifest_update, r=matklad
authorbors <bors@rust-lang.org>
Thu, 22 Mar 2018 11:50:27 +0000 (11:50 +0000)
committerbors <bors@rust-lang.org>
Thu, 22 Mar 2018 11:50:27 +0000 (11:50 +0000)
manifest: update default lto for release and bench to "thin"

[redacted]


Trivial merge