Generated projects again

src/python/grpcio/grpc_core_dependencies.py

@@ -188,6 +188,7 @@ CORE_SOURCE_FILES = [
   'src/core/surface/server.c',
   'src/core/surface/server_chttp2.c',
   'src/core/surface/server_create.c',
+  'src/core/surface/validate_metadata.c',
   'src/core/surface/version.c',
   'src/core/transport/byte_stream.c',
   'src/core/transport/chttp2/alpn.c',