libbonobo: inherit only gnomebase

* add dependency on dbus, dbus-glib
  | configure:14835: error: Package requirements (	gmodule-2.0 >=
  2.0.1 	ORBit-2.0 >= 2.4.0 	ORBit-CosNaming-2.0 >= 2.4.0 	dbus-1
  >= 1.0.0 dbus-glib-1 >= 0.74 	libxml-2.0 >= 2.4.20) were not met:
  |
  | No package 'dbus-1' found
  | No package 'dbus-glib-1' found

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>