opengnb: add opengnb 1.6.8 to openwrt - #29879

Checking PR #29879: opengnb: add opengnb 1.6.8 to openwrt (Makefile Audit)

Commit 0bac353 - opengnb: add version 1.6.8:

✅ Mandatory structural metadata present: 'PKG_MAINTAINER'
✅ Mandatory structural metadata present: 'PKG_LICENSE'
✅ Mandatory structural metadata present: 'PKG_LICENSE_FILES'
✅ PKG_MAINTAINER email address format is valid: 'hollidgelongsun157@gmail.com'
✅ PKG_LICENSE uses no deprecated or informal SPDX identifiers
✅ Makefile does not assign per-package variables at the top level
✅ Makefile contains valid assignment operators and no spaces after ':='
✅ Makefile blocks contain valid indentation (spaces for metadata/description, tabs for build/install recipes)
✅ 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 contain clean UNIX (LF) line termination
✅ All modified files contain a trailing newline

Package Release Audit:

✅ New package net/opengnb correctly initializes PKG_RELEASE to 1