Python: add pyside uic extra compiler

To be able to autocomplete code from .ui forms we need to feed the
python language server the compiled form. The uic extra compiler
generates a temporary ui_name.py file for uncompiled or unsaved ui
files. These files are inside a folder that gets appended to the python
path environment variable for the python language server.

Change-Id: I9f48d2012162f33986639315189c41e0a7e0dad2
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/plugins/python/pythonrunconfiguration.h

@@ -31,6 +31,24 @@
 namespace Python {
 namespace Internal {
 
+class PySideUicExtraCompiler;
+
+class PythonRunConfiguration : public ProjectExplorer::RunConfiguration
+{
+    Q_OBJECT
+public:
+    PythonRunConfiguration(ProjectExplorer::Target *target, Utils::Id id);
+    ~PythonRunConfiguration() override;
+    void currentInterpreterChanged();
+    QList<PySideUicExtraCompiler *> extraCompilers() const;
+
+private:
+    void updateExtraCompilers();
+    Utils::FilePath m_pySideUicPath;
+
+    QList<PySideUicExtraCompiler *> m_extraCompilers;
+};
+
 class PythonRunConfigurationFactory : public ProjectExplorer::RunConfigurationFactory
 {
 public: