Maemo: Introduce abstract base class for deploy steps targeting devices.

This will make it possible for a MaemoRunConfiguration to work
with deploy steps that do not use Utils::SshConnection, but still
want to make use of our device configurations.

src/plugins/qt4projectmanager/qt-maemo/maemodebugsupport.cpp

@@ -31,7 +31,6 @@
 
 #include "maemodebugsupport.h"
 
-#include "abstractmaemodeploystep.h"
 #include "maemodeployables.h"
 #include "maemoglobal.h"
 #include "maemosshrunner.h"