openshift: Add (stub) make e2e

This is step 1 of 3 in the dance necessary to add e2e tests. Next up,
the job definition itself (in 'openshift/release').

Signed-off-by: Stephen Finucane <[email protected]>

Author: stephenfin

openshift/Makefile

@@ -79,5 +79,8 @@ modules:
 test:
 	go test ./...
 
+.PHONY: e2e
+e2e:
+
 .PHONY: ALWAYS
 ALWAYS: