* [z3] Update to 4.8.16
* Use Python3 instead of Python2
Python2 is EOL and the build script works with Python3, so we should
prefer Python3
* Update version
* [z3] Update to 4.8.15
* Update version
* Don't build test executables
* Update version
* Disable examples
* Update version
* Fix 32 bit builds with upstream patch
3828130791
* Update version