Let clickable install libtdjson

It shouldn't be up to the application build system to install the files of an external library.

Instead use clickable's facilities to make sure it ends up in the final click.

For this to work we need to force the lib install dir for tdlib, otherwise for amd64 it's lib and for arm it's lib/, breaking the glob.

Also don't install the namelink (libtdjson.so) since it's not used at runtime