Qt 5 static build scripts

This is a set of scripts to download and build static Qt assembly for purpose to use them on CI

Qt 5.15.2 (Ubuntu 18.04, GCC7)
Before to run a build, install dependencies:

Qt 5.14.2 (Ubuntu 16.04, GCC8)
Before to run a build, install dependencies:

Qt 5.9.9 (Ubuntu 14.04, GCC8)
Before to run a build, install dependencies:

A build script: