[ARM] Only test tls-disable-literal-pool.c if target supports native TLS

2017-05-19  Prakhar Bahuguna  <prakhar.bahuguna@arm.com>

    gcc/testsuite/
    * gcc.target/arm/tls-disable-literal-pool.c: Change
    require-effective-target to tls_native.
    Move dg-error to return statement line and change to dg-message.

From-SVN: r248270

gcc/testsuite/ChangeLog

+2017-05-19  Prakhar Bahuguna  <prakhar.bahuguna@arm.com>
+
+	* gcc.target/arm/tls-disable-literal-pool.c: Change
+	require-effective-target to tls_native.
+	Move dg-error to return statement line and change to dg-message.
+
 2017-05-19  Richard Biener  <rguenther@suse.de>
 
 	PR c++/80593

gcc/testsuite/gcc.target/arm/tls-disable-literal-pool.c

 /* { dg-do compile } */
-/* { dg-require-effective-target tls } */
+/* { dg-require-effective-target tls_native } */
 /* { dg-require-effective-target arm_cortex_m } */
 /* { dg-require-effective-target arm_thumb2_ok } */
 /* { dg-options "-mslow-flash-data" } */
@@ -9,7 +9,6 @@ __thread int x = 0;
 int
 bar ()
 {
-  return x;
+  return x; /* { dg-message "sorry, unimplemented: accessing thread-local storage is not currently supported with -mpure-code or -mslow-flash-data" } */
 }
 
-/* { dg-error "accessing thread-local storage is not currently supported with -mpure-code or -mslow-flash-data" "" { target *-*-* } 12 } */