moc: support mapping pointers to member functions to indexes

moc: support mapping pointers to member functions to indexes

This change adds QMetaObject::IndexOfMethod as a parameter to
the qt_static_metacall function.
It lets the moc generated code return the index of a signal or slot
given its pointer to member function

This is required to support the new connection syntax

Change-Id: I39198c6699b5aa3599d3d282f7ac79b1e3684d33
Reviewed-by: Bradley T. Hughes <bradley.hughes@nokia.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>