Vk: implicitly enable VK_EXT_extended_dynamic_state.

All the heavyweight features from this extension have to be explicitly
enabled through device features, so it's okay to have it always.

src/Magnum/Vk/Device.cpp

@@ -191,10 +191,12 @@ DeviceCreateInfo::DeviceCreateInfo(DeviceProperties& deviceProperties, const Ext
                 addEnabledExtensions<Extensions::KHR::create_renderpass2>();
         }
 
-        /* Enable the KHR_copy_commands2 extension. Not in any Vulkan version
-           yet. */
+        /* Enable the KHR_copy_commands2 and EXT_extended_dynamic_state
+           extensions. Not in any Vulkan version yet. */
         if(extensionProperties->isSupported<Extensions::KHR::copy_commands2>())
             addEnabledExtensions<Extensions::KHR::copy_commands2>();
+        if(extensionProperties->isSupported<Extensions::EXT::extended_dynamic_state>())
+            addEnabledExtensions<Extensions::EXT::extended_dynamic_state>();
 
         /* Enable the KHR_portability_subset extension, which *has to be*
            enabled when available. Not enabling any of its features though,