VCS: Add a property to Command to indicate expected repo changes

Change-Id: Ia6c929ae64008dcb37695a5358c44096a893e0c4
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>

src/plugins/vcsbase/command.h

@@ -85,6 +85,9 @@ public:
     bool unixTerminalDisabled() const;
     void setUnixTerminalDisabled(bool);
 
+    bool expectChanges() const;
+    void setExpectChanges(bool);
+
     static QString msgTimeout(int seconds);
 
     const QVariant &cookie() const;