have makefile detect src code changes

[adamancini]

Description, Motivation and Context

Please include a summary of the change or what problem it solves. Please also include relevant motivation and context.

Add dependencies to the makefile recipes to build support-bundle binaries. Makefile should now detect changes correctly, so make watchrsync can re-build and re-rsync binaries on changes correctly.

Checklist

• [x] New and existing tests pass locally with introduced changes.
• [ ] Tests for the changes have been added (for bug fixes / features)
• [x] The commit message(s) are informative and highlight any breaking changes
• [x] Any documentation required has been added/updated. For changes to https://troubleshoot.sh/ create a PR here

Does this PR introduce a breaking change?

• [ ] Yes
• [x] No