Add missing cdata update in genmarshal tests
Otherwise the test is flaky, as it may try to include a header that's
not generated yet.
@@ -39,6 +39,9 @@ foreach mlist : mlists
marshaller_c = marshallers[0]
marshaller_h = marshallers[1]
+ cdata = configuration_data()
+ cdata.set_quoted('MARSHALLER_HEADER', 'marshaller-@0@.h'.format(idx))
+
main_c = configure_file(input: 'main.c.in',
output: 'main-@0@.c'.format(idx),
configuration: cdata)
