Fix test that gets skipped as unsupported

	* testsuite/24_iterators/container_access.cc: Move dg-options before
	dg-do directive so the target check uses the -std option.

From-SVN: r272051

libstdc++-v3/ChangeLog

 2019-06-07  Jonathan Wakely  <jwakely@redhat.com>
 
+	* testsuite/24_iterators/container_access.cc: Move dg-options before
+	dg-do directive so the target check uses the -std option.
+
 	PR libstdc++/90770
 	* configure: Regenerate.
 	* src/Makefile.am (stamp-debug): Also test for missing makefile.

libstdc++-v3/testsuite/24_iterators/container_access.cc

-// { dg-do run { target c++17 } }
 // { dg-options "-std=gnu++17" }
+// { dg-do run { target c++17 } }
 
 // Copyright (C) 2015-2019 Free Software Foundation, Inc.
 //