btl_usnic_util.c:ompi_btl_usnic_util_abort() also passes in the strerror().

This commit was SVN r29188.

ompi/mca/btl/usnic/help-mpi-btl-usnic.txt

@@ -103,7 +103,8 @@ server.
   Message:      %s
   File:         %s
   Line:         %d
-
+  Error:        %s
+#
 [ibv API failed after init]
 Open MPI failed a basic verbs operation on a Cisco usNIC device.  This
 is highly unusual and shouldn't happen.  It suggests that there may be