Add the the function softlink to the template rendering, so that
{{ softlink: "/bin/bash" }} for the file `/bin/run.ww` will create
a soft link to `/bin/bash`
It's also possible to "import" soft links from the host, e.g. the
template
{{ ImportLink "/etc/localtime" }}
set the timezone from the host
Signed-off-by: Christian Goll <cgoll@suse.com>