Missing function to populate java error handler abort

Signed-off-by: Aurelien Bouteiller <bouteill@icl.utk.edu>

ompi/mpi/java/java/Errhandler.java

@@ -2,7 +2,7 @@
  * Copyright (c) 2004-2007 The Trustees of Indiana University and Indiana
  *                         University Research and Technology
  *                         Corporation.  All rights reserved.
- * Copyright (c) 2004-2005 The University of Tennessee and The University
+ * Copyright (c) 2004-2020 The University of Tennessee and The University
  *                         of Tennessee Research Foundation.  All rights
  *                         reserved.
  * Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
@@ -55,6 +55,7 @@ public final class Errhandler
 	protected long handle;
 
 	protected static native long getFatal();
+	protected static native long getAbort();
 	protected static native long getReturn();
 
 	protected Errhandler(long handle)