Consider building openshift binaries with CGO_ENABLED=0

Currently the binaries produced by the release process seem to depend on the particular libc used to build them (most likely glibc). This makes them not work in Linux distros with musl (or other alternative libcs), such as Alpine.

I don't pretend to know enough Go to entirely understand the ramifications of this - but given that the build is almost static now, and building with CGO_ENABLED=0 seems to drop the binary size (from 283M to 257M) - would you consider tweaking the release process to make fully static binaries?

Version

[provide output of the openshift version or oc version command]

Steps To Reproduce

1. Download the openshift binary from github releases
2. Try to run it in alpine linux

Current Result

/bin/sh: openshift: not found

This is because it's looking for glibc and failing to find it.

Expected Result

Prints usage and exits.

Additional Information

https://github.com/openshift/source-to-image/issues/727 is similar and targetted at s2i