fuchsia: Fix build

Change-Id: I2af535925d6cc84ee89fd4e253e2cfc68622431b
diff --git a/BUILD.gn b/BUILD.gn
index 9b1340c..f2e28f8 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -55,6 +55,8 @@
     "system/vulkan/goldfish_vulkan.cpp",
     "system/vulkan_enc/CommandBufferStagingStream.cpp",
     "system/vulkan_enc/CommandBufferStagingStream.h",
+    "system/vulkan_enc/DescriptorSetVirtualization.cpp",
+    "system/vulkan_enc/DescriptorSetVirtualization.h",
     "system/vulkan_enc/HostVisibleMemoryVirtualization.cpp",
     "system/vulkan_enc/HostVisibleMemoryVirtualization.h",
     "system/vulkan_enc/ResourceTracker.cpp",