Update CMake to latest release, 3.14.1

Changelog: https://cmake.org/cmake/help/v3.14/release/3.14.html
Local patches: fixes for Boost, Python, and OpenMP

Affected ports:

• opencpn, hugin needed help in finding wx
• kadu is over-enthusiastic in finding non-existent X11 components
• xlife++ does weird things in parsing help output from cmake

Thanks antoine@ for multiple exp-runs.
Thanks tcberner@ for much prep-work.

PR: 236534 223678 227428