sink: Create the base directory for logs if it doesn't exist
sink: Create the base directory for logs if it doesn't exist

Otherwise it has to be manually created in advance.

Closes #67
Reviewed-by: Stef Walter <8a7fbf0f15d3ad982af54ef28f5c117d2494b76c@redhat.com>

stefwalter/cockpituous,cockpit-project/cockpituous,cockpit-project/cockpituous,stefwalter/cockpituous