Make GFORTRAN_9 symbol node depend on GFORTRAN_8.

At some point when the GFORTRAN_9 node was added it was forgotten to
make it depend on GFORTRAN_8. This patch fixes this.

Committed as obvious.

2019-01-07  Janne Blomqvist  <jb@gcc.gnu.org>

       * gfortran.map (GFORTRAN_9): Make GFORTRAN_9 node depend on
       GFORTRAN_8.

From-SVN: r267621

libgfortran/ChangeLog

+2019-01-07  Janne Blomqvist  <jb@gcc.gnu.org>
+
+	* gfortran.map (GFORTRAN_9): Make GFORTRAN_9 node depend on
+	GFORTRAN_8.
+
 2019-01-01  Jakub Jelinek  <jakub@redhat.com>
 
 	Update copyright years.

libgfortran/gfortran.map

@@ -1578,4 +1578,4 @@ GFORTRAN_9 {
   __ieee_arithmetic_MOD_ieee_support_subnormal_4;
   __ieee_arithmetic_MOD_ieee_support_subnormal_8;
   __ieee_arithmetic_MOD_ieee_support_subnormal_noarg;
-};
+} GFORTRAN_8;