asterisk/debug-option:
 * don't select gdb automatically - let an experienced user do it himself the way he prefers (select menuconfig, manually copy to USB stick or whatever)
 * requested by oliver
 * refs #706


git-svn-id: file:///var/svn/freetz/trunk@10727 149334a1-2f27-0410-a3b9-fc62619ac1e6