automatically install goimports when running update-codegen

Author: BenTheElder

hack/update-codegen.sh

@@ -49,6 +49,9 @@ if [[ "${DBG_CODEGEN}" == 1 ]]; then
     kube::log::status "DBG: starting generated_files"
 fi
 
+echo "installing goimports from hack/tools"
+go -C "${KUBE_ROOT}/hack/tools" install golang.org/x/tools/cmd/goimports
+
 # Generate a list of directories we don't want to play in.
 DIRS_TO_AVOID=()
 kube::util::read-array DIRS_TO_AVOID < <(