Debug USE flag

Added CFLAGS=-g to enlightenment-0.17.9999 and efl-1.7.9999 if 'debug' USE flag is set. Also added a whole bunch of use flags to enlightenment-0.17.9999 (mainly because I wanted to turn physics off and got carried away :P). Finally, changed the dbus-services use flag so it's invoked by "dbus", thus should be turned on by default by the desktop profiles.