Compiling as root is highly discouraged, but some people do it anyway.
gcc_ok, however, can clobber /dev/null due to "-o /dev/null"; this is
bad.  Instead, write a temporary file and delete it.

Move <syslinux.h> to <syslinux/idle.h> since that was all that was there;
do_idle() in libutil can simply be a macro for syslinux_idle() or
sched_yield() as appropriate.

Library support for constructing initramfs.  This version is *not*
complete, as it doesn't take into account alignment requirements
properly.

- Move the loadfile() routine into <syslinux/loadfile.h>.
- Actually use the loadfile() routine.