Build

add gcovr to coverage bundle #37

Job	Run time
ubuntu cross container (s390x)	1m 21s
ubuntu cross container (ppc64le)	1m 22s
distro_matrix	4s
ubuntu cross container (armhf)	1m 12s
Build staging container (alpine)	45s
Build staging container (debian)	1m 12s
Build staging container (fedora)	1m 13s
Build staging container (tumbleweed)	1m 4s
Build samurai and muon (debian)	22s
Build samurai and muon (fedora)	25s
Build samurai and muon (tumbleweed)	25s
Build samurai and muon (alpine)	27s
Deploy final containers (alpine)	51s
Deploy final containers (fedora)	1m 48s
Deploy final containers (debian)	1m 41s
Deploy final containers (tumbleweed)	1m 18s
	15m 30s

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