examples: lib: Fix these rotted tests

I think the mgmt lib approach is a good idea, even though I'm not
putting much energy into keeping these up to date. Let's at least
re-enable the tests for now, after a few fixups.

test.sh

@@ -66,8 +66,7 @@ if label-block "basic"; then
 	run-testsuite ./test/test-markdownlint.sh
 	run-testsuite ./test/test-commit-message.sh
 	run-testsuite ./test/test-govet.sh
-	# FIXME: this fails with go.mod
-	skip-testsuite ./test/test-examples.sh
+	run-testsuite ./test/test-examples.sh
 	run-testsuite ./test/test-gotest.sh
 	# FIXME: this fails with go.mod
 	skip-testsuite ./test/test-gometalinter.sh