gpu: Add update after bind handling

Change-Id: I2ee39bde05222c1971e049a7437d34db00f84574
diff --git a/layers/gpu_validation.h b/layers/gpu_validation.h
index cabb4b6..c2d1637 100644
--- a/layers/gpu_validation.h
+++ b/layers/gpu_validation.h
@@ -25,6 +25,7 @@
 struct GpuDeviceMemoryBlock {
     VkBuffer buffer;
     VmaAllocation allocation;
+    std::unordered_map<uint32_t, const cvdescriptorset::Descriptor *> update_at_submit;
 };
 
 struct GpuBufferInfo {