Merge pull request kubernetes-sigs#1336 from christopherhein/check-everything-examples

✨ Checking configfile examples on check_everything.sh

Author: k8s-ci-robot

hack/check-everything.sh

@@ -37,6 +37,8 @@ ${hack_dir}/test-all.sh
 header_text "confirming examples compile (via go install)"
 go install ${MOD_OPT} ./examples/builtins
 go install ${MOD_OPT} ./examples/crd
+go install ${MOD_OPT} ./examples/configfile/builtin
+go install ${MOD_OPT} ./examples/configfile/custom
 
 echo "passed"
 exit 0