I have a change  that currently fails some jenkins jobs, so it gets
-1 from it. After pushing patchset 4 (a mere rebase actually), I ran
build-artifacts-on-demand ("ci please build"), and it passed, and set
CI +1. Then I rebased again and again got -1 as expected.
IMO build-artifacts-on-demand should not set CI +1, it might be
misleading for the maintainer to think that all is good when in fact
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