test-serve: let run-tests.py kill the daemons
If the daemons die while the tests are still running, we'll get additional
"killed!" messages, making the test fail.
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)