Added GetTempDir

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@42290 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/filename.h

@@ -270,6 +270,9 @@ public:
     void AssignHomeDir();
     static wxString GetHomeDir();
 
+        // get the system temporary directory
+    static wxString GetTempDir();
+
 #if wxUSE_FILE || wxUSE_FFILE
         // get a temp file name starting with the specified prefix
     void AssignTempFileName(const wxString& prefix);