Exclude Skia/Dawn ExternalVkImage interop tests on Linux CFI

Failing a CFI check in third_party/vulkan_memory_allocator

Tbr: kbr@chromium.org
Bug: 1139916
Change-Id: I588a5ce228b41ac386fb0a477ee4e889631c0a83
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2485678Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Austin Eng <enga@chromium.org>
Cr-Commit-Position: refs/heads/master@{#818734}

gpu/BUILD.gn

@@ -428,7 +428,8 @@ test("gl_tests") {
     ]
   } else if (is_linux || is_chromeos) {
     # Simply loading the Vulkan driver leaks crbug.com/1134681
-    if (enable_vulkan && !is_lsan) {
+    # CFI error in third_party/vulkan_memory_allocator crbug.com/1139916
+    if (enable_vulkan && !is_lsan && !is_cfi) {
       deps += [ "//gpu/vulkan/init:init" ]
       sources +=
           [ "command_buffer/service/external_vk_image_factory_unittest.cc" ]