Add missing Multi-Release attribute to manifest for MVStore jar

h2/src/installer/mvstore/MANIFEST.MF

@@ -14,6 +14,7 @@ Bundle-Vendor: H2 Group
 Bundle-Version: ${version}
 Bundle-License: http://www.h2database.com/html/license.html
 Bundle-Category: utility
+Multi-Release: true
 Import-Package: javax.crypto,
  javax.crypto.spec
 Export-Package: org.h2.mvstore;version="${version}",