message: Skip VulkanImageWrappingTests on SwiftShader
  These tests hit a failing ASSERT in SwiftShader.
  Suppressing to get the bots running and green.
  TBR=cwallez@chromium.org
diff: @@ -33,9 +33,8 @@ namespace dawn_native { namespace vulkan {
  public:
  void SetUp() override {
  DawnTest::SetUp();
  - if (UsesWire()) {
  - return;
  - }
  + DAWN_SKIP_TEST_IF(UsesWire());
  + DAWN_SKIP_TEST_IF(IsSwiftshader());
  deviceVk = reinterpret_cast<dawn_native::vulkan::Device*>(device.Get());
  }
  @@ -203,7 +202,7 @@ namespace dawn_native { namespace vulkan {
  public:
  void SetUp() override {
  VulkanImageWrappingTestBase::SetUp();
  - if (UsesWire()) {
  + if (UsesWire() || IsSwiftshader()) {
  return;
  }
  @@ -221,7 +220,7 @@ namespace dawn_native { namespace vulkan {
  }
  void TearDown() override {
  - if (UsesWire()) {
  + if (UsesWire() || IsSwiftshader()) {
  VulkanImageWrappingTestBase::TearDown();
  return;
  }
  @@ -355,7 +354,7 @@ namespace dawn_native { namespace vulkan {
  public:
  void SetUp() override {
  VulkanImageWrappingTestBase::SetUp();
  - if (UsesWire()) {
  + if (UsesWire() || IsSwiftshader()) {
  return;
  }
  @@ -383,7 +382,7 @@ namespace dawn_native { namespace vulkan {
  }
  void TearDown() override {
  - if (UsesWire()) {
  + if (UsesWire() || IsSwiftshader()) {
  VulkanImageWrappingTestBase::TearDown();
  return;
  }
  