Update graphics/ksnip to latest upstream revision
- various bugfixes
- files installed to more "standard" locations
Release notes at (2 links, we skipped one release)
https://github.com/ksnip/ksnip/releases/tag/v1.7.3
https://github.com/ksnip/ksnip/releases/tag/v1.7.2
Reported by: portscout