layers: Move DescriptorUpdateTemplate functions

In unique_objects, moved these functions from being auto-generated to
being manually written.

Change-Id: Iae7ccac0ad51d57826104bd0532742a098c673ce
diff --git a/scripts/unique_objects_generator.py b/scripts/unique_objects_generator.py
index fdf4c38..bafb7ae 100644
--- a/scripts/unique_objects_generator.py
+++ b/scripts/unique_objects_generator.py
@@ -140,6 +140,10 @@
             'vkEnumerateInstanceLayerProperties',
             'vkEnumerateDeviceLayerProperties',
             'vkEnumerateInstanceExtensionProperties',
+            'vkCreateDescriptorUpdateTemplateKHR',
+            'vkDestroyDescriptorUpdateTemplateKHR',
+            'vkUpdateDescriptorSetWithTemplateKHR',
+            'vkCmdPushDescriptorSetWithTemplateKHR',
             ]
         # Commands shadowed by interface functions and are not implemented
         self.interface_functions = [