MDEV-4600 mariadb-galera-server-5.5 on ubuntu has no dependency to galera while debian has.

        dependency on galera added to the Ubuntu packaging script.

debian/dist/Ubuntu/control

@@ -15,7 +15,7 @@ Architecture: any
 Suggests: tinyca, mailx, mariadb-test
 Recommends: libhtml-template-perl
 Pre-Depends: mariadb-common, adduser (>= 3.40), debconf
-Depends: mariadb-client-5.5 (>= ${source:Version}), libdbi-perl, perl (>= 5.6), ${shlibs:Depends}, ${misc:Depends}, psmisc, passwd, lsb-base (>= 3.0-10), libmariadbclient18 (>= ${binary:Version})
+Depends: mariadb-client-5.5 (>= ${source:Version}), libdbi-perl, perl (>= 5.6), ${shlibs:Depends}, ${misc:Depends}, psmisc, passwd, lsb-base (>= 3.0-10), libmariadbclient18 (>= ${binary:Version}), galera (>=23.2)
 Provides:  mysql-server-core, mysql-server-core-5.1, mysql-server-core-5.5, mariadb-galera-server, mysql-server, virtual-mysql-server
 Conflicts: mariadb-server, mysql-server, mariadb-galera-server (<< ${source:Version}),
     mysql-server-4.1, mysql-server-5.0, mysql-server-5.1, mysql-server-5.5,