[beta] Backporting PRs to beta#39734

Merged

bors merged 9 commits intorust-lang:betafrom

alexcrichton:beta-next

Feb 11, 2017

Commits on Feb 11, 2017

rustbuild: Add x.py to source tarballs
alexcrichton
committed
libbacktrace: Fix uninitialized variable

petrochenkov
authored and
alexcrichton
committed
Update relnotes for 1.15.1

brson
authored and
alexcrichton
committed
Uninhabited while-let pattern fix

canndrew
authored and
alexcrichton
committed
Remove use of ptr::eq

canndrew
authored and
alexcrichton
committed
Fix make tidy

canndrew
authored and
alexcrichton
committed
Fix a manifest-generation bug on beta
alexcrichton
committed
Bump stable release date

brson
authored and
alexcrichton
committed
Update 1.15.1 relnotes

brson
authored and
alexcrichton
committed