add examples

Dan Jacobson <[email protected]> Thu, 23 Apr 2026 05:22:43 +0800

Newsgroups	gmane.comp.gnu.make.bugs
Message-ID	<[email protected]>

(info "(make) Target-specific") says

   Multiple TARGET values create a target-specific variable value for
each member of the target list individually.

Be sure to add examples.