- Add patch to fix build with tls1.3 supported openssl
* 00308-tls-1.3.patch
- Add patch to fix Py_Main calls after Py_initialize
* 00307-allow-to-call-Py_Main-after-Py_Initialize.patch

- Add -fwrapv to OPTS, which is default for python3 anyway
See for example https://github.com/zopefoundation/persistent/issues/86
for bugs which are caused by avoiding it.

- Fix ownership of _contextvars, _queue, and _xxtestfuzz

- Switch off LTO for distros with older GCC
- Fix %files

- Add dependency over libuuid-devel

- update to python 3.7.0
Complete overview of changes is available on
https://docs.python.org/3/whatsnew/3.7.html, these are just
highlights:
* PEP 563, postponed evaluation of type annotations.
* async and await are now reserved keywords.
* New library modules:
contextvars: PEP 567 – Context Variables
dataclasses: PEP 557 – Data Classes
importlib.resources
* New built-in features:
PEP 553, the new breakpoint() function.
* Python data model improvements:
PEP 562, customization of access to module attributes.