That is, do not link to the qbscore library anymore. Instead, use the
JSON-based API.
Advantages:
- We can build Qt Creator with qbs support without qbs being present
on the build machine.
- Smaller memory footprint for Qt Creator, as the qbs build graphs
are now being managed by a separate process.
- Potential crashes in qbs will not kill the Qt Creator process.
Fixes: QTCREATORBUG-20622
Task-number: QTCREATORBUG-22904
Change-Id: If7d344b0ac65a99ff0a3a3db215d61b8d903e47e
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
