Fix FAIL: special_functions/18_riemann_zeta/check_value.cc (test for excess errors)

From-SVN: r233391

libstdc++-v3/testsuite/special_functions/18_riemann_zeta/check_value.cc

@@ -20,7 +20,7 @@
 //  riemann_zeta
 
 // This can take long on simulators, timing out the test.
-// { dg-options "-DMAX_ITERATIONS=5" { target simulator } }
+// { dg-additional-options "-DMAX_ITERATIONS=5" { target simulator } }
 
 #ifndef MAX_ITERATIONS
 #define MAX_ITERATIONS (sizeof(data001) / sizeof(testcase_riemann_zeta<double>))
@@ -109,9 +109,6 @@ data001[55] =
 const double toler001 = 2.5000000000000020e-13;
 //  riemann_zeta
 
-// This can take long on simulators, timing out the test.
-// { dg-options "-DMAX_ITERATIONS=5" { target simulator } }
-
 #ifndef MAX_ITERATIONS
 #define MAX_ITERATIONS (sizeof(data001) / sizeof(testcase_riemann_zeta<double>))
 #endif