Fix Xcode 8 beta 2

3 jobs for master in 6 minutes and 46 seconds (queued for 7 seconds)
Status Job ID Name Coverage
  Build
canceled #4458
autoscale-linux
linux

00:06:41

failed #4464
openswift
osx

00:00:05

failed #4459
openswift
osx

00:00:17

 
Name Stage Failure
failed
osx Build There is an unknown failure, please try again
atpkg/src/Package.swift:132:34: error: use of undeclared type 'BinaryChannel'
public var binaryChannels : [BinaryChannel]?
^~~~~~~~~~~~~
atpkg/src/Package.swift:132:34: error: use of undeclared type 'BinaryChannel'
public var binaryChannels : [BinaryChannel]?
^~~~~~~~~~~~~
<unknown>:0: error: build had 1 command failures

ERROR: Build failed: exit status 1