Test

Support RTMP play or view client. #1655

Job	Run time
utest-regression-blackbox-test	9m 38s
cygwin64-cache	1m 55s
multiple-arch-aarch64	23m 10s
multiple-arch-armv7	21m 52s
fast	1s
cygwin64	13m 50s
build-ubuntu20	3m 36s
build-cross-arm	5m 16s
build-cross-aarch64	5m 13s
build-centos7	4m 57s
build-ubuntu16	3m 3s
build-ubuntu18	3m 6s
coverage	3m 38s
multiple-arch-amd64	2m 25s
test-done	1s
	1h 41m 41s

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