package/kismet: bump to version 2020-12-R3

package/kismet: bump to version 2020-12-R3

- Drop patch (already in version) and so autoreconf
- libmicrohttpd is not a dependency since version 2020-12-R1 and
  https://github.com/kismetwireless/kismet/commit/a78a0ddc72f9916c4da54480c97b3040796c1047
- libwebsockets is an optional dependency since version 2020-12-R1 and
  https://github.com/kismetwireless/kismet/commit/77b5809ae35e3f8d91f349c618e593d67b50f279

https://www.kismetwireless.net/release/kismet-2020-12-R1

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