tests: Add build test for cadvisor example

Signed-off-by: Rolf Neugebauer <rolf.neugebauer@docker.com>

test/cases/000_build/100_examples/080_cadvisor/test.sh

@@ -0,0 +1,22 @@
+#!/bin/sh
+# SUMMARY: Test the cadvisor example
+# LABELS:
+
+set -e
+
+# Source libraries. Uncomment if needed/defined
+#. "${RT_LIB}"
+. "${RT_PROJECT_ROOT}/_lib/lib.sh"
+
+NAME=cadvisor
+
+clean_up() {
+	rm -f ${NAME}*
+}
+
+trap clean_up EXIT
+
+# Test code goes here
+linuxkit build "${LINUXKIT_EXAMPLES_DIR}/${NAME}.yml" 
+
+exit 0