** New attribute 'producer' for gdb.Symtab objects.
** gdb.Objfile objects have a new attribute "progspace",
which is the gdb.Progspace object of the containing program space.
+ ** gdb.Objfile objects have a new attribute "owner".
** gdb.Objfile objects have a new attribute "build_id",
which is the build ID generated when the file was built.
** gdb.Objfile objects have a new method "add_separate_debug_file".