[releng] Move to Tycho 0.22.0

This shortens the target platform files by utilizing includeSources (Bug
411664).

Change-Id: I1e2f7b81417cc470df708954351b319ca88f2e6f
Signed-off-by: Andreas Sewe <andreas.sewe@codetrails.com>
Merge "[releng] Move to Tycho 0.22.0"