DF-5724 fix-validation build log
================================

The full guest-side make output was held in the guest's /tmp/build.log and
became unreachable when the guest entered the known post-DDB resume wedge
(this rig's artifact, see DF-5720 run.wedge-session1) before it could be
scpd. The verbatim tail as captured live over ssh at build time:

    $ sh /tmp/kbuild.sh            # cd /usr/src &&
                                  # make -j6 nativekernel KERNCONF=X86_64_GENERIC &&
                                  # make installkernel
    BUILD_RC=0
    >>> Kernel install for X86_64_GENERIC completed on Sat Oct 10 17:53:17 UTC 2026
    --------------------------------------------------------------
    KERNEL_INSTALLED

(buildkernel proper refused with "You must buildworld before buildkernel";
nativekernel — the makefile's own suggested native-tools path — used instead.)

Post-install verification:
    $ uname -v
    DragonFly 6.5-DEVELOPMENT #1: Sat Oct 10 17:53:17 UTC 2026     root@dfbsd:/usr/obj/usr/src/sys/X86_64_GENERIC

...followed by the fixed-kernel DDB session captured in serial.fixedkernel.log.