scripts: annotate with acbuild with supports-systemd-notify

[heyitsanthony]

Fixes #7840

/cc @multi-io

[gyuho]

LGTM. Didn't know about that subcommand 👍

[multi-io]

Thanks. :)

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (master@3f1f5e5). Click here to learn what that means.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master    #7846   +/-   ##
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  Coverage          ?   75.54%           
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  Files             ?      332           
  Lines             ?    26177           
  Branches          ?        0           
=========================================
  Hits              ?    19776           
  Misses            ?     4970           
  Partials          ?     1431

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