mariadb-common: make mysql-common dependency versioned

to ensure /usr/share/mysql-common/configure-symlinks is available

debian/changelog

+mariadb-10.0 (10.0.20-3) UNRELEASED; urgency=medium
+
+  [ Andreas Beckmann ]
+  * mariadb-common: Depend on a version of mysql-common that ships
+    /usr/share/mysql-common/configure-symlinks.  (Closes: #787533)
+
+ -- Andreas Beckmann <anbe@debian.org>  Wed, 08 Jul 2015 09:09:58 +0200
+
 mariadb-10.0 (10.0.20-2) unstable; urgency=low
 
   * Fix bash test logic in postinstall (Closes: #789589)

debian/control

@@ -43,16 +43,13 @@ Description: MariaDB embedded database development files
 
 Package: mariadb-common
 Architecture: all
-Depends: mysql-common, ${misc:Depends}
+Depends: mysql-common (>= 5.6.25), ${misc:Depends}
 Multi-Arch: foreign
 Description: MariaDB common metapackage
  MariaDB is a fast, stable and true multi-user, multi-threaded SQL database
  server. SQL (Structured Query Language) is the most popular database query
  language in the world. The main goals of MariaDB are speed, robustness and
  ease of use.
- .
- This empty metapackage makes the introduction on MariaDB specific
- configurationfiles easier at any later time.
 
 Package: mariadb-client-core-10.0
 Architecture: any