ci: add basic integration test for pmb

Yes, I know this is crude/basic, but others are welcome to improve it later. I think we need some integration testing asap, and this is better than nothing :D

.ci/integration.sh

@@ -13,7 +13,7 @@ echo "Initializing pmbootstrap"
 yes '' | ./pmbootstrap.py --details-to-stdout init
 
 ./pmbootstrap.py work_migrate
-./pmbootstrap.py config aports "$pmaports"
+# ./pmbootstrap.py config aports "$pmaports"
 ./pmbootstrap.py -q shutdown
 
 # TODO: make device configurable?