[geoloc] Mark Builder constructor as deprecated

smack-extensions/src/main/java/org/jivesoftware/smackx/geoloc/packet/GeoLocation.java

@@ -388,6 +388,15 @@ public final class GeoLocation implements Serializable, ExtensionElement, FormFi
         private String tzo;
         private URI uri;
 
+        /**
+         * Deprecated, do not use.
+         * @deprecated use {@link GeoLocation#builder()} instead.
+         */
+        @Deprecated
+        // TODO Make constructor private in Smack 4.6.
+        public Builder() {
+        }
+
         /**
          * Sets accuracy of horizontal GPS error in meters.
          *