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

@@ -15,6 +15,7 @@ if ! "yes '' | ./pmbootstrap.py \
 		init \
 		>/tmp/pmb_init 2>&1"; then
 	cat /tmp/pmb_init
+fi
 
 ./pmbootstrap.py work_migrate
 ./pmbootstrap.py config aports "$pmaports"