[ci] Update linux environment
Azure pipelines removed 16.04
MODIFY
other/azure-pipelines/build-linux.yml
other/azure-pipelines/build-linux.yml
parameters:
name: 'BuildLinux'
- vmImage: 'ubuntu-16.04'
+ vmImage: 'ubuntu-18.04'
container: 'debian:stretch'
arch: '' # set it to i386 fof 32-bit build
buildSystem: 'cmake' # either 'cmake' or 'make'

[ci] Update linux environment

Azure pipelines removed 16.04