Test template-based connect() with qmetaobjectbuilder

Test template-based connect() with qmetaobjectbuilder

For template-based connect(), the meta-object is resolved at
compile-time (the virtual metaObject() function isn't called).
But we can make it work by copying the members of the dynamically
constructed meta-object to the statically defined one.

Change-Id: Ia4d3263a89008e36e187c584db6d25d9042f32b3
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
Reviewed-by: Bradley T. Hughes <bradley.hughes@nokia.com>