main/dropbear: fix depends for dropbear-scp
execute with dropbear-scp-2024.85-r0
$ scp test localhost:
/usr/bin/dbclient: No such file or directory
lost connection
execute with dropbear-scp-2024.85-r0
$ scp test localhost:
/usr/bin/dbclient: No such file or directory
lost connection