This is needed to build libprofiler_builtins now.
e59f0cc0d3 (diff-daf9539767b10f18e1517f65cdc2e0e2)
https://github.com/rust-lang-nursery/compiler-builtins/issues/295
This is needed to build libprofiler_builtins now.
e59f0cc0d3 (diff-daf9539767b10f18e1517f65cdc2e0e2)
https://github.com/rust-lang-nursery/compiler-builtins/issues/295