Split driver compilation from cross build

Makefile

@@ -183,7 +183,7 @@ $(GOPATH)/bin/go-bindata:
 	GOBIN=$(GOPATH)/bin go get github.com/jteeuwen/go-bindata/...
 
 .PHONY: cross
-cross: out/localkube out/minikube-linux-amd64 out/minikube-darwin-amd64 out/minikube-windows-amd64.exe out/docker-machine-driver-hyperkit out/docker-machine-driver-kvm2
+cross: out/localkube out/minikube-linux-amd64 out/minikube-darwin-amd64 out/minikube-windows-amd64.exe
 
 .PHONY: e2e-cross
 e2e-cross: e2e-linux-amd64 e2e-darwin-amd64 e2e-windows-amd64.exe

hack/jenkins/minikube_cross_build_and_upload.sh

@@ -44,9 +44,13 @@ export GOPATH=~/go
 # We build these on Linux, but run the tests on different platforms.
 # This makes it easier to provision slaves, since they don't need to have a go toolchain.'
 # Cross also builds the hyperkit and kvm2 drivers.
-BUILD_IN_DOCKER=y make cross e2e-cross
+BUILD_IN_DOCKER=y make cross 
+BUILD_IN_DOCKER=y make e2e-cross
 cp -r test/integration/testdata out/
 
+BUILD_IN_DOCKER=y make out/docker-machine-driver-hyperkit
+BUILD_IN_DOCKER=y make out/docker-machine-driver-kvm2
+
 # Don't upload the buildroot artifacts if they exist
 rm -r out/buildroot || true