Build

fixes and improvements for nvme_copy_test #4420

Job	Run time
cross (s390x)	49s
build libnvme and nvme-cli separately	41s
libnvme (debian, gcc, release)	51s
muon minimal static	32s
make static	48s
cross (armhf)	41s
musl libc build on Debian	36s
musl libc build on Alpine	39s
musl libc minimal static build on Debian	28s
windows-msys2-ucrt64	1m 26s
cross (ppc64le)	49s
nvme-cli (fedora, clang, release)	51s
nvme-cli (fedora, clang, debug)	53s
nvme-cli (fedora, gcc, debug)	49s
nvme-cli (tumbleweed, gcc, release)	1m 24s
nvme-cli (fedora, gcc, release)	1m 0s
nvme-cli (debian, clang, release)	1m 4s
nvme-cli (tumbleweed, gcc, debug)	56s
nvme-cli (debian, gcc, release)	1m 3s
nvme-cli (tumbleweed, clang, debug)	51s
nvme-cli (tumbleweed, clang, release)	1m 5s
nvme-cli (debian, gcc, debug)	54s
nvme-cli (debian, clang, debug)	1m 0s
fallback shared libraries	0s
	20m 10s

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