Revert "Utils: Replace SynchronousCommand::flags by a named bool"

This reverts commit c617632e4d9291f1b50ec0c7e1a914a6a689284e.

To early, dependencies missing.

Change-Id: I91433aebbaf2c04cbb212585deb3cde5f3208974
Reviewed-by: hjk <hjk@qt.io>

src/plugins/vcsbase/vcscommand.h

@@ -51,6 +51,7 @@ public:
                                                  const Utils::ExitCodeInterpreter &interpreter = Utils::defaultExitCodeInterpreter) override;
 
 private:
+    unsigned processFlags() const override;
     void emitRepositoryChanged(const QString &workingDirectory);
 
     void coreAboutToClose() override;