gdb/

gdb/
	Change gdb.Value.address from a method to an attribute.
	* python/python-value.c (value_object): Add `address' element.
	(valpy_dealloc): Decrement reference to self->address if set.
	(valpy_new): Initialize val_obj->address.
	(valpy_address): Rename to ...
	(valpy_get_address): ... this.  Change signature from method to
	attribute.  Update self->address if not set.
	(value_to_value_object): Initialize val_obj->address.
	(value_object_getset): Add `address' element.
	(value_object_methods): Remove `address' element.

gdb/testsuite/
	* gdb.python/python-value.exp: Add tests for the address
	attribute.

gdb/doc/
	* gdb.texinfo (Values From Inferior): Change gdb.Value.address
	from a method to an attribute.