fix(#14135): error: use of undeclared identifier SIGKILL on FreeBSD 13.0
fix(#14135): error: use of undeclared identifier SIGKILL on FreeBSD 13.0

Fixes https://github.com/bazelbuild/bazel/issues/14135

@philwo

Closes #14136.

PiperOrigin-RevId: 425862185

cushon/bazel,cushon/bazel,ButterflyNetwork/bazel,ButterflyNetwork/bazel,cushon/bazel,katre/bazel,bazelbuild/bazel,katre/bazel,bazelbuild/bazel,ButterflyNetwork/bazel,katre/bazel,bazelbuild/bazel,bazelbuild/bazel,ButterflyNetwork/bazel,cushon/bazel,katre/bazel,bazelbuild/bazel,katre/bazel,bazelbuild/bazel,ButterflyNetwork/bazel,ButterflyNetwork/bazel,katre/bazel,cushon/bazel,cushon/bazel