Rollup of 17 pull requests#64452

Closed

Centril wants to merge 49 commits intorust-lang:masterfrom

Centril:rollup-z101tu8

Commits on Aug 24, 2019

Added table containing the system calls used by Instant and SystemTime.
Christian
committed

Commits on Aug 26, 2019

Update src/libstd/time.rs

DevQps
and
tesuji
authored

Commits on Sep 3, 2019

Commits on Sep 8, 2019

Remove two unnecessary `clone()` calls.
nnethercote
committed

Commits on Sep 9, 2019

Commits on Sep 10, 2019

use randSecure and randABytes
bpangWR
committed

Commits on Sep 13, 2019

Commits on Sep 14, 2019