Checking PR #30079: snapcast: add libsoxr dependency to snapclient (as was done already for snapserver) (Makefile Audit Profile)

Commit afc90fc - snapcast: add libsoxr dependency to snapclient:

✅ Makefile contains valid assignment operators and no spaces after ':='
✅ Makefile blocks contain valid indentation (spaces for metadata/description, tabs for build/install recipes)
✅ 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 sound/snapcast content changed without a PKG_RELEASE or version bump. Please increment PKG_RELEASE by 1 (or bump PKG_VERSION/PKG_SOURCE_DATE and reset PKG_RELEASE to 1) so users receive the update.

• 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.