MFC: r287805

MFC: r287805

Unconditionally build CTF tools in the bootstrap-tools phase of the build.

Stale CTF tools are a frequent source of DTrace issues, and they compile
quickly enough that the increase in build time is negligible.

Apart from what's described in the original commit message above, this
change also fixes building GENERIC kernels, i. e. kernel configurations
having "makeoptions WITH_CTF=1", when the host world has been built with
WITHOUT_CDDL.

git-svn-id: svn://svn.freebsd.org/base/stable/10@331031 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f