Experimental Features for Multi-project linker scripts, debug, and run

[ReinhardKeil]

The Problem To Be Solved

The document Experimental Features describes Multi-project linker scripts, debug, and run. For making progress, the proposal is to implement these features.

[brondani]

Initial implementation: #1912, #1896

[brondani]

Proper multi-core support in cbuild-run needs to be clarified: similarly to sequences many other nodes such as algorithms, svd and elf files should also have a processor pname because they can be specific for each processor. In such case wouldn't it be better to generate separated cbuild-run files according to the processor names?