Build failure for ``no options PTRACE''

[Paul Goyette <paul%whooppee.com@localhost>]

For a custom kernel build with ``no options PTRACE'' and ``no options
COREDUMP'' defined, and sources updated on 2020-10-16 at 13:18:24 UTC,
I get the following linker error:

#      link  SPEEDY/netbsd
/build/netbsd-local/tools/x86_64/amd64/bin/x86_64--netbsd-ld -Map netbsd.map --cref -T netbsd.ldscript -Ttext 0xffffffff80200000 -e start -z max-page-size=0x200000 -X -o netbsd ${SYSTEM_OBJ:[@]:Nswapnetbsd.o} ${EXTRA_OBJ} vers.o swapnetbsd.o
/build/netbsd-local/tools/x86_64/amd64/bin/x86_64--netbsd-ld: process_machdep.o: in function `ptrace_machdep_dorequest':
/build/netbsd-local/src/sys/arch/amd64/amd64/process_machdep.c:329: undefined reference to `ptrace_update_lwp'
/build/netbsd-local/tools/x86_64/amd64/bin/x86_64--netbsd-ld: /build/netbsd-local/src/sys/arch/amd64/amd64/process_machdep.c:372: undefined reference to `ptrace_update_lwp'
*** [netbsd] Error code 1

nbmake: stopped in /build/netbsd-local/obj/amd64/sys/arch/amd64/compile/SPEEDY
1 error

nbmake: stopped in /build/netbsd-local/obj/amd64/sys/arch/amd64/compile/SPEEDY

ERROR: Failed to make all in "/build/netbsd-local/obj/amd64/sys/arch/amd64/compile/SPEEDY"
*** BUILD ABORTED ***




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