Properly map the OS for OSX 10.12 support
Properly map the OS for OSX 10.12 support

I pushed fully rebuilt binaries for OSX to pantsbuild
bintray, this just updates the map to point to it.

(sapling split of 46b7d00ab0e58c159cabab2e1f8855098b7a1def)

foursquare/fsqio,foursquare/fsqio,foursquare/fsqio,foursquare/fsqio,foursquare/fsqio