Correct an invalid reference to a missing help file.

This commit was SVN r25573.

orte/mca/ess/tool/ess_tool_module.c

@@ -99,8 +99,8 @@ static int rte_init(void)
 
 error:
     if (ORTE_ERR_SILENT != ret && !orte_report_silent_errors) {
-        orte_show_help("help-ess-tool.txt",
-                       "tool:rte_init:startup:internal-failure",
+        orte_show_help("help-orte-runtime.txt",
+                       "orte_init:startup:internal-failure",
                        true, error, ORTE_ERROR_NAME(ret), ret);
     }