Add xglDestroyDevice() call to test framework.
diff --git a/tests/render_tests.cpp b/tests/render_tests.cpp
index bd63078..60b47d4 100644
--- a/tests/render_tests.cpp
+++ b/tests/render_tests.cpp
@@ -256,6 +256,7 @@
 
     virtual void TearDown() {
         xglInitAndEnumerateGpus(&this->app_info, XGL_NULL_HANDLE, 0, &gpu_count, XGL_NULL_HANDLE);
+        m_device->destroy_device();
     }
 };