Update CMake to latest release, 3.14.1
Local patches: fixes for Boost, Python, and OpenMP
- 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