Checking PR #29801: mwan3: prefer default route source address (Makefile Audit Profile)

Commit 8c64a86 - mwan3: bump PKG_VERSION to 2.12.2:

✅ PKG_VERSION bump matches context information inside subject line (2.12.2)
✅ Makefile contains valid assignment operators and no spaces after ':='
✅ Makefile does not reuse PKG_NAME in call, define, or eval lines
✅ File additions contain clean UNIX (LF) line termination
✅ All modified files contain a trailing newline

Package Release Audit:

⚠️ Warning: Package net/mwan3 content changed without a PKG_RELEASE or version bump

• Do not increment release for minor changes. Cosmetic edits (e.g., typos in comments, copyright updates, formatting/whitespace), changing the package maintainer (PKG_MAINTAINER), or updating source download info (PKG_SOURCE_URL / PKG_HASH) do not require incrementing PKG_RELEASE.