Cross Reference: /prebuilts/go/darwin-x86/src/internal

`Name`	`Date`	`Size`
Up to higher level directory
`format/`	21-Oct-2016
`singleflight/`	21-Oct-2016
`syscall/`	21-Oct-2016
`testenv/`	21-Oct-2016
`trace/`	21-Oct-2016