mk: actually run valgrind on x86_64-apple-darwin#30365

Merged

bors merged 2 commits intorust-lang:masterfrom tamird:update-valgrind

Dec 31, 2015

+35-58

Commits on Dec 18, 2015

mk: actually run valgrind on x86_64-apple-darwin
tamird
committed

Commits on Dec 25, 2015

update valgrind suppressions
tamird
committed