adding travis build rule
adding travis build rule

Signed-off-by: Vishnu kannan <8c9a7175bd62235d51889a4697184181a7bcfb30@google.com>

GoogleCloudPlatform/k8s-node-termination-handler,GoogleCloudPlatform/k8s-node-termination-handler,GoogleCloudPlatform/k8s-node-termination-handler