[issue19569] Use __attribute__((deprecated)) to warn usage of deprecated functions and macros

[Serhiy Storchaka]

Changes by Serhiy Storchaka <storchaka+cpython at gmail.com>:


----------
pull_requests:  -1085

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue19569>
_______________________________________