Git: Add reflog

Change-Id: Id328492826bdcf4b7f7e6933a9dc3931174de0fb
Reviewed-by: Petar Perisin <petar.perisin@gmail.com>
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>

src/plugins/git/gitplugin.h

@@ -115,6 +115,7 @@ private slots:
     void blameFile();
     void logProject();
     void logRepository();
+    void reflogRepository();
     void undoFileChanges(bool revertStaging = true);
     void undoUnstagedFileChanges();
     void resetRepository();