python-typing_extensions-3.7.2-bp152.3.16

- Rebase the patch to the current git state

- Add support for Python <3.5, using upstream commit as
  test-sys-executable.patch to fix the tests, replacing custom sed.
- Remove unnecessary buid dependency on pytest and pytest-xdist

- Drop the old tarball

- Replace test_modules.tar.gz with python-testsuite
- Remove fix_tests.patch which is half fixing test_modules.tar.gz,
  and the other half is replaced with a less brittle sed.
- Remove unnecessary build dependencies
- Update to 3.7.2
  * Pass *args and **kwargs to superclass in Generic.__new__
  * Fix for issue #524
  * Fix typing_extensions to support PEP 560
  * Add annotations to NamedTuple children __new__ constructors
  * Add missing 'NoReturn' to __all__ in typing.py
  * Backport Generic.__new__ fix
  * Fix IO.closed to be property
  * Add Final to typing_extensions
  * Fix instance/subclass checks of functions against runtime protocols
  * Add Literal[...] types to typing_extensions

- Initial effort to package typing_extensions-3.6.6