[g++, testsuite] XFAIL thread_local-order2.C on newlib

testsuite/
	* g++.dg/tls/thread_local-order2.C: XFAIL on newlib.

As commented by Mike, it's better that newlib support this feature, tracked by

  https://sourceware.org/bugzilla/show_bug.cgi?id=21325

From-SVN: r246563

gcc/testsuite/ChangeLog

+2017-03-28  Jiong Wang  <jiong.wang@arm.com>
+
+	* g++.dg/tls/thread_local-order2.C: XFAIL on newlib.
+
 2017-03-28  Segher Boessenkool  <segher@kernel.crashing.org>
 
 	PR testsuite/43496

gcc/testsuite/g++.dg/tls/thread_local-order2.C

@@ -6,7 +6,7 @@
 // { dg-require-effective-target c++11 }
 // { dg-add-options tls }
 // { dg-require-effective-target tls_runtime }
-// { dg-xfail-run-if "" { hppa*-*-hpux* *-*-solaris* } }
+// { dg-xfail-run-if "" { { hppa*-*-hpux* *-*-solaris* } || { newlib } } }
 
 extern "C" void abort();
 extern "C" int printf (const char *, ...);