Fixed a cmake CMP0022 warning, disabled ec_interface.c, now ettercap links with ec_interfaces library, disabled link against STATIC ec_interfaces, instead we need to properly link libraries against ettercap target
when linking ec_interfaces and ec_lua we need to add required libs, since they are static libraries
Not needed anymore to link tests with ec_interface
Merge pull request #461 from LocutusOfBorg/458-fix

Fixed a cmake CMP0022 warning, disabled ec_interface.c,