Vulkan: Suppress VU Undefined-Value-ShaderOutputNotConsumed

Bug: angleproject:8401
Change-Id: I3b561ec98090cf1c0050f113db96ea0c6c79d785
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/5002728
Auto-Submit: Shahbaz Youssefi <syoussefi@chromium.org>
Commit-Queue: Yuxin Hu <yuxinhu@google.com>
Reviewed-by: Yuxin Hu <yuxinhu@google.com>
diff --git a/src/libANGLE/renderer/vulkan/RendererVk.cpp b/src/libANGLE/renderer/vulkan/RendererVk.cpp
index 7cfe973..744ad6c 100644
--- a/src/libANGLE/renderer/vulkan/RendererVk.cpp
+++ b/src/libANGLE/renderer/vulkan/RendererVk.cpp
@@ -201,6 +201,8 @@
 
 // Array of Validation error/warning messages that will be ignored, should include bugID
 constexpr const char *kSkippedMessages[] = {
+    // http://anglebug.com/8401
+    "Undefined-Value-ShaderOutputNotConsumed",
     // http://anglebug.com/5304
     "VUID-vkCmdDraw-magFilter-04553", "VUID-vkCmdDrawIndexed-magFilter-04553",
     // http://anglebug.com/5309