[][openwrt][common][build][Fix autobuild fail]

[Description]
Fix autobuild flow fail due to 21.02 feed config updated

[Release-log]
N/A

Change-Id: Idd05a90dbdb01b520dcea518b4335cb775ef0957
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/6439609
2 files changed