gcc.dg/pr87485.c: Require scheduling

[Hans-Peter Nilsson]

Committed as obvious, fixing one failure for mmix-knuth-mmixware.

gcc/testsuite:
        * gcc.dg/pr87485.c: Require scheduling.

--- gcc/gcc/testsuite/gcc.dg/pr87485.c.orig     Mon Jul 20 03:50:14 2020
+++ gcc/gcc/testsuite/gcc.dg/pr87485.c  Mon Jul 20 03:50:31 2020
@@ -2,6 +2,7 @@
 /* { dg-do compile { target int128 } } */
 /* { dg-options "-O2 -fschedule-insns -fno-guess-branch-probability 
-fno-isolate-erroneous-paths-dereference -fno-omit-frame-pointer 
-fno-split-wide-types -fno-tree-ccp -fno-tree-sra" } */
 /* { dg-additional-options "-fstack-protector-strong" { target 
fstack_protector } } */
+/* { dg-require-effective-target scheduling } */

 int *a;