mdt: Ensure we build wheels

bdist doesn't actually build something that twine can upload for binaries.

Change-Id: I64bbf96166fe0fedc4d8a3ee6cc1fd436810b09b
diff --git a/Makefile b/Makefile
index 9222fec..3e823a6 100644
--- a/Makefile
+++ b/Makefile
@@ -4,7 +4,7 @@
 	dpkg-buildpackage -tc --no-sign
 
 wheel:
-	python3 setup.py sdist bdist
+	python3 setup.py sdist bdist_wheel
 
 upload: wheel
 	python3 -m twine upload dist/*