bird2, bird3: update to 2.19.3 and 3.3.3 - #1207

Checking PR #1207: bird2, bird3: update to 2.19.3 and 3.3.3 (Makefile Audit)

Commit eab7c58 - bird2: update to 2.19.3:

✅ PKG_VERSION bump matches context information inside subject line (2.19.3)
✅ Makefile does not assign per-package variables at the top level
✅ Makefile contains valid assignment operators and no spaces after ':='
✅ No feed package forces its own inclusion into buildbot default images via DEFAULT+BUILDBOT
✅ Makefile does not reuse PKG_NAME in call, define, or eval lines
✅ File additions are text
✅ File additions contain clean UNIX (LF) line termination
✅ All modified files contain a trailing newline

Commit 7996dd7 - bird3: update to 3.3.3:

✅ PKG_VERSION bump matches context information inside subject line (3.3.3)
✅ Makefile does not assign per-package variables at the top level
✅ Makefile contains valid assignment operators and no spaces after ':='
✅ No feed package forces its own inclusion into buildbot default images via DEFAULT+BUILDBOT
✅ Makefile does not reuse PKG_NAME in call, define, or eval lines
✅ File additions are text
✅ File additions contain clean UNIX (LF) line termination
✅ All modified files contain a trailing newline

Package Release Audit:

✅ Package bird2 version updated to '2.19.3' and PKG_RELEASE correctly reset to 1
✅ Package bird3 version updated to '3.3.3' and PKG_RELEASE correctly reset to 1

Package Hash Audit:

✅ Package Makefile 'bird2/Makefile' updates the source checksum together with the version
✅ Package Makefile 'bird3/Makefile' updates the source checksum together with the version