[][Add etc/wireless folder to system config backup folder]

[Description]
Add etc/wireless folder to system config backup folder

[Release-log]
N/A

Change-Id: I4514075a559508bd1953a682aa83c22674813eaa
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/4787794
1 file changed