loader: Add support for 1.0.35 extension

Add support for the NVX_device_generated_commands.  This was
necessary since it exposes one instance command (which takes
a VkPhysicalDevice).

Change-Id: I1da4c24ca0d385a6485581f55a1b19aa7ea51d24
diff --git a/loader/extensions.h b/loader/extensions.h
index 2e922e5..7175965 100644
--- a/loader/extensions.h
+++ b/loader/extensions.h
@@ -45,3 +45,11 @@
     VkImageTiling tiling, VkImageUsageFlags usage, VkImageCreateFlags flags,
     VkExternalMemoryHandleTypeFlagsNV externalHandleType,
     VkExternalImageFormatPropertiesNV *pExternalImageFormatProperties);
+
+// Instance extension terminators for the VK_NVX_device_generated_commands
+// extension
+VKAPI_ATTR void VKAPI_CALL
+terminator_GetPhysicalDeviceGeneratedCommandsPropertiesNVX(
+    VkPhysicalDevice physicalDevice,
+    VkDeviceGeneratedCommandsFeaturesNVX *pFeatures,
+    VkDeviceGeneratedCommandsLimitsNVX *pLimits);