Bumped Standards-Version to 3.9.8 (no changes).

debian/control

 Source: dune-common
 Section: libs
 Priority: optional
-Standards-Version: 3.9.6
+Standards-Version: 3.9.8
 Maintainer: Debian Science Maintainers <debian-science-maintainers@lists.alioth.debian.org>
 Uploaders: Ansgar Burchardt <ansgar@debian.org>, Oliver Sander <sander@mi.fu-berlin.de>
 Vcs-Browser: https://anonscm.debian.org/cgit/debian-science/packages/dune-common.git