Bug images: disable cgo
We're still seeing random coredumps / segfaults on rhel7 binaries on
rhel8. Disable cgo again.
FROM registry.svc.ci.openshift.org/ocp/builder:golang-1.12 AS builder
WORKDIR /go/src/github.com/openshift/sdn
COPY . .
-RUN make build --warn-undefined-variables
+RUN CGO_ENABLED=0 make build --warn-undefined-variables
FROM registry.svc.ci.openshift.org/ocp/4.2:base
COPY --from=builder /go/src/github.com/openshift/sdn/openshift-sdn /usr/bin/
