Merge branch 'NinjaMake' into 'master'

Add option to build with ninja to build script

See merge request !5156

(cherry picked from commit a87cb54c [formerly 0b9fb6a6fb423a745f64eb6492e2bbeb22248b86])

38f18018 Merge branch 'master' of https://gitlab.cern.ch:8443/atlas/athena
09271c78 Merge branch 'master' of https://gitlab.cern.ch:8442/atlas/athena
0cca206b Merge branch 'master' of https://gitlab.cern.ch:8443/atlas/athena
a8d866c2 Merge branch 'master' of https://gitlab.cern.ch:8443/atlas/athena
30d21f0d Merge branch 'master' of https://gitlab.cern.ch:8443/atlas/athena
ea9052da Merge branch 'master' of https://gitlab.cern.ch:8443/atlas/athena
52c24699 Added option to build athena using Ninja
30778e97 Different install rule for ninja
41bdfbc7 Set environment varible before command

Former-commit-id: 580e4e2739bff2519e354d760609eeb535ecfc3b