package/kismet: link with libatomic if needed

Fix build of kismet-2020-09-R3 with riscv64

Fixes:
 - http://autobuild.buildroot.org/results/9c3d56ef837c7c5bfbb34a0ec51b349108e201b1

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
1 file changed