I did this on OS X 10.10.5 (14F27) using the iOS SDK included in Xcode
6.4 (6E35b). This commit contains the same SYS_SYSCTL -> SYS___SYSCTL
workaround found in commit 9ef4b6c1; see its description for more info.

Change-Id: I4dddc2a6d030ce297ee711f4430ec9db3abcda50
Reviewed-on: https://go-review.googlesource.com/14094Reviewed-by: Minux Ma <minux@golang.org>
Reviewed-by: David Crawshaw <crawshaw@golang.org>