Change the way uobject/uobject.mk is meant to be used: by its parent only.
Change the way uobject/uobject.mk is meant to be used: by its parent only.

       * src/liburbi/uobject/uobject.mk: Stop using "uobject_srcdir",
       it does not work, because basically, one cannot use subdir-objects
       and macro names in file names: in that case Automake's machinery to
       create the stub dependency files (which is run by config.status) has
       no way to know the value of the macro that define the path, and
       produces junk.
       So rather, use bootstrap to put this directory as a son of its
       user.

aldebaran/urbi,aldebaran/urbi,urbiforge/urbi,aldebaran/urbi,urbiforge/urbi,urbiforge/urbi,urbiforge/urbi,aldebaran/urbi,urbiforge/urbi,aldebaran/urbi,urbiforge/urbi,urbiforge/urbi,aldebaran/urbi,urbiforge/urbi,urbiforge/urbi,aldebaran/urbi,aldebaran/urbi