Makefile: add extra_objs to opensips dependencies

(cherry picked from commit 81b19cb5d24430b5e2ea129a2b0d4b07d8a74c98)

Conflicts:
	Makefile.rules

(cherry picked from commit 45d526c2c2780fd01639c96a30be8a88819db01c)

Conflicts:
	Makefile.rules
dialog: re-evaluate the AVP after running callbacks

The SST module callbacks might change the dialog lifetime