Merge pull request #26164 from ryantrinkle/lndir-silent

Silence lndir output in symlinkJoin

pkgs/build-support/trivial-builders.nix

···
       ''
         mkdir -p $out
         for i in $paths; do
-          ${lndir}/bin/lndir $i $out
+          ${lndir}/bin/lndir -silent $i $out
         done
         ${postBuild}
       '';