remove remaining make_unique usage

Change-Id: I2dfc8e09daaea0f93f9737b8738fdcd2c2fae539
Reviewed-on: https://swiftshader-review.googlesource.com/c/23808
Tested-by: Chris Forbes <chrisforbes@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
diff --git a/src/Vulkan/VkCommandBuffer.cpp b/src/Vulkan/VkCommandBuffer.cpp
index 0d766a9..b4ece01 100644
--- a/src/Vulkan/VkCommandBuffer.cpp
+++ b/src/Vulkan/VkCommandBuffer.cpp
@@ -643,7 +643,7 @@
 
 	for(uint32_t i = 0; i < rangeCount; i++)
 	{
-		commands->push_back(std::make_unique<ClearColorImage>(image, pColor[i], pRanges[i]));
+		addCommand<ClearColorImage>(image, pColor[i], pRanges[i]);
 	}
 }
 
@@ -654,7 +654,7 @@
 
 	for(uint32_t i = 0; i < rangeCount; i++)
 	{
-		commands->push_back(std::make_unique<ClearDepthStencilImage>(image, pDepthStencil[i], pRanges[i]));
+		addCommand<ClearDepthStencilImage>(image, pDepthStencil[i], pRanges[i]);
 	}
 }