Overhaul deps on generator tools

This forces a regeneration if the generation tools are rebuilt.

Also clean up Makefile a bit.

hack/jenkins/test-dockerized.sh

@@ -52,6 +52,7 @@ export LOG_LEVEL=4
 cd /go/src/k8s.io/kubernetes
 rm -rf Godeps/_workspace # Temporary until _workspace is fully obliterated
 
+make generated_files
 go install ./cmd/...
 ./hack/install-etcd.sh
 

hack/make-rules/vet.sh

@@ -25,6 +25,7 @@ cd "${KUBE_ROOT}"
 
 # This is required before we run govet for the results to be correct.
 # See https://github.com/golang/go/issues/16086 for details.
+make generated_files
 go install ./cmd/...
 
 # Use eval to preserve embedded quoted strings.

hack/update-codecgen.sh

@@ -117,6 +117,7 @@ if [[ -z ${haveindex} ]]; then
 fi
 
 echo "Building codecgen"
+make generated_files
 CODECGEN="${PWD}/codecgen_binary"
 go build -o "${CODECGEN}" ./vendor/github.com/ugorji/go/codec/codecgen