Bump version to 6.8.5

Author: tomcallahan

.ci/bwcVersions

@@ -70,3 +70,4 @@ BWC_VERSION:
   - "6.8.1"
   - "6.8.2"
   - "6.8.3"
+  - "6.8.4"

buildSrc/version.properties

@@ -1,4 +1,4 @@
-elasticsearch     = 6.8.4
+elasticsearch     = 6.8.5
 lucene            = 7.7.2
 
 # optional dependencies

server/src/main/java/org/elasticsearch/Version.java

@@ -148,8 +148,9 @@ public class Version implements Comparable<Version>, ToXContentFragment {
     public static final Version V_6_8_2 = new Version(6080299, org.apache.lucene.util.Version.LUCENE_7_7_0);
     public static final Version V_6_8_3 = new Version(6080399, org.apache.lucene.util.Version.LUCENE_7_7_0);
     public static final Version V_6_8_4 = new Version(6080499, org.apache.lucene.util.Version.LUCENE_7_7_2);
+    public static final Version V_6_8_5 = new Version(6080599, org.apache.lucene.util.Version.LUCENE_7_7_2);
 
-    public static final Version CURRENT = V_6_8_4;
+    public static final Version CURRENT = V_6_8_5;
 
 
     private static final ImmutableOpenIntMap<Version> idToVersion;