WebRTC: fix h264 FU-A only one package #3657

Job	Run time
utest-regression-blackbox-test	9m 38s
cygwin64-cache	1m 46s
multiple-arch-aarch64	22m 53s
multiple-arch-armv7	21m 55s
cygwin64	16m 5s
fast	1s
build-ubuntu18	3m 7s
build-centos7	5m 2s
build-ubuntu16	3m 14s
build-cross-aarch64	5m 14s
build-ubuntu20	3m 31s
build-cross-arm	5m 29s
coverage	3m 37s
multiple-arch-amd64	2m 17s
test-done	1s
	1h 43m 50s

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