sys/targets: add a kernel address range for FreeBSD/amd64 kernels #15764

Job	Run time
build	4m 34s
aux	3m 59s
dashboard	2m 54s
race	9m 48s
arch (presubmit_arch_linux)	10m 45s
arch (presubmit_arch_freebsd)	6m 5s
gvisor	3m 30s
old	6m 48s
arch (presubmit_arch_netbsd)	3m 42s
arch (presubmit_arch_openbsd)	3m 35s
race_dashboard	4m 0s
arch (presubmit_arch_darwin)	3m 40s
arch (presubmit_arch_windows)	3m 24s
arch (presubmit_arch_executor)	3m 15s
	1h 9m 59s

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