Fix $$OUT_PWD not beeing set for finding the target/destdir

Qt Creator wouldn't find the correct target if shadow building a project
that uses $$OUT_PWD, like for example itemviews-ng.
We didn't set the necessary variable on the ProFileReader *, simplified
the code to always use a ProFileReader created for the exact
profilenode.

src/plugins/qt4projectmanager/qt4nodes.h

@@ -123,6 +123,11 @@ public:
     bool renameFile(const FileType fileType,
                     const QString &filePath, const QString &newFilePath);
 
+    Qt4PriFileNode *findProFileFor(const QString &string);
+
+    //internal
+    ProFileReader *createProFileReader() const;
+
 protected:
     void clear();
     static QStringList varNames(FileType type);
@@ -142,7 +147,6 @@ protected:
                      ChangeType change);
 
     QString buildDir() const;
-    ProFileReader *createProFileReader() const;
 
 private slots:
     void scheduleUpdate();
@@ -198,8 +202,6 @@ private:
     QStringList subDirsPaths(ProFileReader *reader) const;
     QStringList qBuildSubDirsPaths(const QString &scanDir)  const;
 
-
-
     void invalidate();
 
     Qt4ProjectType m_projectType;