undo CL 135230043 / 60812bad3769

broke api check everywhere

««« original CL description
runtime: fix openbsd build

LGTM=iant
R=iant, minux
CC=golang-codereviews, jsing
https://codereview.appspot.com/135230043

Committer: Ian Lance Taylor <iant@golang.org>
»»»

TBR=mdempsky
CC=golang-codereviews
https://codereview.appspot.com/137010043