bldmefirst without repo - Removed bldmefirst repo from 'foundation' and 'clean', adn changed sources_fcl.csv files to use FCLs for 'deviceplatformrelease' and build bldmefirst from sources.

Removed setting of sf.project.type, as it's the same for all these projects, so can be done in the sf-platform config file.

Added helix packasge (now added to cache).

Sorted this sources csv file to match the order in the prebuilt system definition. This means that a system defintion which is collated from the peices in the csv file comes out the same as the prebuilt version, which verifies that it's all OK.

Corrected tech domains for packages where they were wrong, and added them where they were missing.

Moved packages in tools and ostools repository locations into the (new) corresponding layers of the model.