added SIGFPE to default list of signals that generate a backtrace (where supported)

This commit was SVN r8632.

ompi/runtime/ompi_mpi_params.c

@@ -83,6 +83,9 @@ int ompi_mpi_register_params(void)
 #endif
 #ifdef SIGSEGV
             SIGSEGV,
+#endif
+#ifdef SIGFPE
+            SIGFPE,
 #endif
             -1
         };