add execinfo for netbsd #3898

Job	Run time
cargo-deny	33s
fmt	18s
check	36s
clippy (macos-latest)	1m 0s
clippy (ubuntu-latest)	39s
clippy (windows-latest)	1m 23s
test (macos-latest)	2m 24s
test (ubuntu-latest)	2m 1s
generate-matrix	34s
test (windows-latest)	4m 12s
shellcheck	10s
remote	0s
foreign	0s
bisect	0s
target (${{ matrix.pretty }},${{ matrix.os }})	0s
docker-in-docker	0s
podman	0s
publish	0s
conclusion	1s
Coverage	24s
	14m 15s

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