Create targets for UPB release

PiperOrigin-RevId: 441496547

cmake/make_cmakelists.py

diff --git a/cmake/make_cmakelists.py b/cmake/make_cmakelists.py
index 29c73bb..655d809 100755
--- a/cmake/make_cmakelists.py
+++ b/cmake/make_cmakelists.py
@@ -234,6 +234,12 @@
   def register_toolchains(self, toolchain):
     pass
 
+  def python_source_archive(self, **kwargs):
+    pass
+
+  def python_nuget_package(self, **kwargs):
+    pass
+
 
 class Converter(object):
   def __init__(self):