Fix test failure when -fno-inline is used

This currently checks _GLIBCXX_USE_DUAL_ABI which is incorrect, as that
can be true when _GLIBCXX_USE_CXX11_ABI == 0. The correct check would be
_GLIBCXX_USE_CXX11_ABI == 1, but that's made redundant by the cxx11-abi
effective target that the test requires. However, the test will fail if
-fno-inline is used, so check __NO_INLINE__ instead.

	* testsuite/23_containers/list/61347.cc: Avoid spurious failure when
	-fno-inline added to test flags.

From-SVN: r267582

libstdc++-v3/ChangeLog

 2019-01-04  Jonathan Wakely  <jwakely@redhat.com>
 
+	* testsuite/23_containers/list/61347.cc: Avoid spurious failure when
+	-fno-inline added to test flags.
+
 	* testsuite/21_strings/basic_string/requirements/
 	explicit_instantiation/debug.cc: Remove XFAIL for old ABI.
 

libstdc++-v3/testsuite/23_containers/list/61347.cc

@@ -42,7 +42,7 @@ void testc(const std::list<short>& l)
 
 int main()
 {
-#if _GLIBCXX_USE_DUAL_ABI
+#if ! __NO_INLINE__
   std::list<short> l;
   testm(l);
   testc(l);