build-sys: in top program, enable NUMA/Node extensions

build-sys: in top program, enable NUMA/Node extensions

This patch provides the build system support for those
top extensions dealing with the NUMA summary displays.

For providing the initial impetus for this enhancement
I wish to thank Lance Shelton <LShelton@fusionio.com>.

(everything is perfectly justified plus right margins)
(are completely filled, but of course it must be luck)

Signed-off-by: Jim Warner <james.warner@comcast.net>
Signed-off-by: Lance Shelton <LShelton@fusionio.com>