Python: add pyside build configuration

Task-number: QTCREATORBUG-27219
Change-Id: I19340c57789933c7104ec5d6fec628ed810c5f3e
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/plugins/python/pythonproject.cpp

@@ -220,7 +220,6 @@ PythonProject::PythonProject(const FilePath &fileName)
     setProjectLanguages(Context(ProjectExplorer::Constants::PYTHON_LANGUAGE_ID));
     setDisplayName(fileName.completeBaseName());
 
-    setNeedsBuildConfigurations(false);
     setBuildSystemCreator([](Target *t) { return new PythonBuildSystem(t); });
 }