Unfortunately, there's very little information in the logs; it looks like it stopped very early, which suggests to me that it couldn't find its data. How was Gutenprint installed?
Cannot connect to canon MP620
Canon Selphy not printing 100% borderless
Samsung ML-1630W Printer Driver
Hi, Unfortunately, this printer appears to only support Samsung Printing Language (SPL), which is a proprietary printer command set that we don't have any way of supporting.
No, I'm sorry, we don't provide pre-built packages for any system other than Macintosh.
Again, I suggest you contact the OpenWRT people, since Gutenprint proper builds cleanly (albeit there are some warnings that we'll want to clean up). We aren't in a position to help with OpenWRT issues.
The Gutenprint portion did build correctly. You'd probably do best contacting the OpenWRT team for assistance.