build

fabrics: fix concat during connect-all #3569

Job	Run time
build libnvme and nvme-cli separately	40s
muon minimal static	35s
make static	37s
cross (armhf)	45s
cross (ppc64le)	48s
libnvme (gcc, release)	47s
nvme-cli (gcc, release)	52s
libnvme (gcc, debug)	43s
nvme-cli (clang, release)	52s
nvme-cli (clang, debug)	55s
cross (s390x)	48s
nvme-cli (gcc, debug)	43s
libnvme (clang, debug)	45s
libnvme (clang, release)	43s
fallback shared libraries	0s
	10m 33s

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