[][OpenWrt Dev][Add release-specific package overriding]

[Description]
Add release-specific package overriding to solve patching failure due to
different package versions for different oprnwrt releases.

[Release-log]
N/A

Change-Id: I6785bfe0ebc59e598ee4fbf225e3ecb3442e6894
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/5902796
3 files changed