hwloc: errors: improve the advice to send hwloc-gather-topology files in the OS error message

(cherry picked from commit open-mpi/hwloc@f77aa01b3c)
Signed-off-by: Jeff Squyres <jsquyres@cisco.com>

opal/mca/hwloc/hwloc191/hwloc/src/topology.c

@@ -79,7 +79,7 @@ void hwloc_report_os_error(const char *msg, int line)
         fprintf(stderr, "*\n");
         fprintf(stderr, "* Please report this error message to the hwloc user's mailing list,\n");
 #ifdef HWLOC_LINUX_SYS
-        fprintf(stderr, "* along with the output from the hwloc-gather-topology script.\n");
+        fprintf(stderr, "* along with the output+tarball generated by the hwloc-gather-topology script.\n");
 #else
 	fprintf(stderr, "* along with any relevant topology information from your platform.\n");
 #endif