Rollup of 14 pull requests#59141

Closed

emilyalbini wants to merge 51 commits intorust-lang:masterfrom

emilyalbini:rollup

Commits on Mar 1, 2019

Commits on Mar 4, 2019

fs::copy() unix: set file mode early
haraldh
committed

Commits on Mar 5, 2019

fs::copy() set file mode early
haraldh
committed
Update compiler_builtins to 0.1.7
Jordan Rhee
committed

Commits on Mar 8, 2019

Fix documentation of from_ne_bytes and from_le_bytes
xTibor
committed

Commits on Mar 9, 2019

Commits on Mar 10, 2019

Use lifetime contravariance to elide more lifetimes in core+alloc+std
scottmcm
committed

Commits on Mar 12, 2019