PathChooser: Provide static way to expand a directory...

...to be able to fetch working directory even for
non-active targets.

Change-Id: I563e9b56e8a8393b998811e0fb364078d4c37d03
Reviewed-by: hjk <hjk@theqtcompany.com>

src/libs/utils/pathchooser.h

@@ -96,6 +96,9 @@ public:
     FileName rawFileName() const; // The raw unexpanded input.
     FileName fileName() const;
 
+    static QString expandedDirectory(const QString &input, const Utils::Environment &env,
+                                     const QString &baseDir);
+
     QString baseDirectory() const;
     void setBaseDirectory(const QString &directory);