test: SKIP deprecated/access_deco for MSL backend

This does not pass validation.

Change-Id: I3e63ad899d346321a4dea13f3a681d01546ed2bb
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/53621
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
diff --git a/test/deprecated/access_deco/storage_texture.wgsl.expected.msl b/test/deprecated/access_deco/storage_texture.wgsl.expected.msl
index 44a2faf..3ed6e7c 100644
--- a/test/deprecated/access_deco/storage_texture.wgsl.expected.msl
+++ b/test/deprecated/access_deco/storage_texture.wgsl.expected.msl
@@ -1,7 +1,12 @@
+SKIP: FAILED
+
 deprecated/access_deco/storage_texture.wgsl:1:84 warning: use of deprecated language feature: access control is expected as last parameter of storage textures
 [[group(0), binding(0)]] var tex : [[access(write)]] texture_storage_2d<rgba32float>;
                                                                                    ^
 
+
+
+Validation Failure:
 #include <metal_stdlib>
 
 using namespace metal;
@@ -10,3 +15,11 @@
   return;
 }
 
+
+tint_Aillrb.metal:5:17: error: use of undeclared identifier 'tex'
+  int2 x = int2(tex.get_width(), tex.get_height());
+                ^
+tint_Aillrb.metal:5:34: error: use of undeclared identifier 'tex'
+  int2 x = int2(tex.get_width(), tex.get_height());
+                                 ^
+2 errors generated.