libmach: cross compiling support         We already use GOHOSTOS to represent the host OS that the toolchain         will be run on, so no need to resort to uname(1) to get that (and         use uname(1) will make cross-compiling for another host impossible).
libmach: cross compiling support
        We already use GOHOSTOS to represent the host OS that the toolchain
        will be run on, so no need to resort to uname(1) to get that (and
        use uname(1) will make cross-compiling for another host impossible).

R=rsc, golang-dev
CC=golang-dev
http://codereview.appspot.com/5530050

Committer: Russ Cox <5ad239cb8a44f659eaaee0aa1ea5b94947abe557@golang.org>
abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go