build

net/af_xdp: make compatible with libbpf 0.8.0 #211

Job	Run time
ubuntu-20.04-gcc-static	10m 51s
ubuntu-20.04-gcc-shared-mini	2m 53s
ubuntu-20.04-gcc-shared-abi+doc+tests	13m 7s
ubuntu-20.04-clang-static	8m 3s
ubuntu-20.04-clang-shared-doc+tests	10m 18s
ubuntu-20.04-gcc-static-i386	5m 41s
ubuntu-20.04-gcc-static-aarch64	12m 47s
ubuntu-20.04-gcc-shared-aarch64	12m 49s
ubuntu-20.04-gcc-static-ppc64le	6m 54s
ubuntu-20.04-gcc-shared-ppc64le	6m 34s
	1h 29m 57s

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