[testsuite] Minor tweak to 4 Aarch64 testcases

[Eric Botcazou]

These 4 Aarch64 testcases use dg-xfail-if to disable themselves on ARM, while 
all the other equivalent testcases use dg-skip-if.  The latter form is better 
because it doesn't unnecessarily pollute the testsuite report.

Tested on arm-eabi, OK for the mainline?


2018-07-13  Eric Botcazou  <ebotca...@adacore.com>

        * gcc.target/aarch64/advsimd-intrinsics/vld1x2.c: Replace dg-xfail-if
        with dg-skip-if for ARM targets.
        * gcc.target/aarch64/advsimd-intrinsics/vld1x3.c: Likewise.
        * gcc.target/aarch64/advsimd-intrinsics/vst1x2.c: Likewise.
        * gcc.target/aarch64/advsimd-intrinsics/vst1x3.c: Likewise.

-- 
Eric Botcazou
Index: gcc.target/aarch64/advsimd-intrinsics/vld1x2.c
===================================================================
--- gcc.target/aarch64/advsimd-intrinsics/vld1x2.c	(revision 262551)
+++ gcc.target/aarch64/advsimd-intrinsics/vld1x2.c	(working copy)
@@ -1,7 +1,7 @@
 /* We haven't implemented these intrinsics for arm yet.  */
-/* { dg-xfail-if "" { arm*-*-* } } */
 /* { dg-do run } */
 /* { dg-options "-O3" } */
+/* { dg-skip-if "" { arm*-*-* } } */
 
 #include <arm_neon.h>
 
Index: gcc.target/aarch64/advsimd-intrinsics/vld1x3.c
===================================================================
--- gcc.target/aarch64/advsimd-intrinsics/vld1x3.c	(revision 262551)
+++ gcc.target/aarch64/advsimd-intrinsics/vld1x3.c	(working copy)
@@ -1,7 +1,7 @@
 /* We haven't implemented these intrinsics for arm yet.  */
-/* { dg-xfail-if "" { arm*-*-* } } */
 /* { dg-do run } */
 /* { dg-options "-O3" } */
+/* { dg-skip-if "" { arm*-*-* } } */
 
 #include <arm_neon.h>
 #include "arm-neon-ref.h"
Index: gcc.target/aarch64/advsimd-intrinsics/vst1x2.c
===================================================================
--- gcc.target/aarch64/advsimd-intrinsics/vst1x2.c	(revision 262551)
+++ gcc.target/aarch64/advsimd-intrinsics/vst1x2.c	(working copy)
@@ -1,7 +1,7 @@
 /* We haven't implemented these intrinsics for arm yet.  */
-/* { dg-xfail-if "" { arm*-*-* } } */
 /* { dg-do run } */
 /* { dg-options "-O3" } */
+/* { dg-skip-if "" { arm*-*-* } } */
 
 #include <arm_neon.h>
 #include "arm-neon-ref.h"
Index: gcc.target/aarch64/advsimd-intrinsics/vst1x3.c
===================================================================
--- gcc.target/aarch64/advsimd-intrinsics/vst1x3.c	(revision 262551)
+++ gcc.target/aarch64/advsimd-intrinsics/vst1x3.c	(working copy)
@@ -1,7 +1,7 @@
 /* We haven't implemented these intrinsics for arm yet.  */
-/* { dg-xfail-if "" { arm*-*-* } } */
 /* { dg-do run } */
 /* { dg-options "-O3" } */
+/* { dg-skip-if "" { arm*-*-* } } */
 
 #include <arm_neon.h>
 #include "arm-neon-ref.h"