Add mlabel as GPLv2 alternative for dosfslabel
The dosfstools were downgraded to v2.11 after switching to the nogplv3 image. This version of dosfstools has no partition labeling tool.
[addition for 746-001602]
This is a follow up to the !33 (merged). I overlooked that fatlabel is also used under a different name in install-scripts/fnginstall-common.sh script.
Edited by Dmitry Petrov