Reduce duplicated files in OpenWRT am: 62d3c860f9 am: 17cab9c94d am: afc52e5bf4

Original change: https://android-review.googlesource.com/c/platform/external/openwrt-prebuilts/+/2369051

Change-Id: Ibe8237f83a514d5368819fb0a3e3d4bdbb711117
Signed-off-by: Automerger Merge Worker <[email protected]>