Log message for linktime composition on Windows (backport #640)

[mergify]

Addresses #514

---

This is an automatic backport of pull request #640 done by Mergify.

[mergify]

Cherry-pick of 8c49a99 has failed:

On branch mergify/bp/jazzy/pr-640
Your branch is up to date with 'origin/jazzy'.

You are currently cherry-picking commit 8c49a99.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   composition/src/linktime_composition.cpp

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   composition/README.md

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

[ahcorde]

Pulls: #743
Gist: https://gist.githubusercontent.com/ahcorde/6c9ccd47adee7eaafe7970155669d91f/raw/f0a437149322d75fef545c754d7461bc5b299f24/ros2.repos
BUILD args: --packages-above-and-dependencies composition
TEST args: --packages-above composition
ROS Distro: jazzy
Job: ci_launcher
ci_launcher ran: https://ci.ros2.org/job/ci_launcher/17182

• Linux
• Linux-aarch64
• Linux-rhel
• Windows