kismet: mark as not available for static builds

This reverts commit a3365ebf, and
marks kismet as not available for static builds.

Commit a3365ebf is indeed
insufficient, since kismet uses <dlfcn.h> in two places, both in
kismet_server and kismet_client. And it's fairly unlikely that kismet
will be used in pure static environments, so let's not support this
use case.

Fixes:

  http://autobuild.buildroot.net/results/c24/c24e3e325df9748e9959fe79f7026d24f118dffd/



Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>