Doc: experimental Clang Static Analyzer plugin

Available in Qt Creator Enterprise.

Change-Id: I22a8ef1edb87b42a2568cf5b1f5f911663d5e5f6
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@theqtcompany.com>
Prevent indefinite recursion in macro expansion

Task-number: QTCREATORBUG-13315
Change-Id: Ibf963569bdebf8a791f0a7ceb8cd010efed99dad
Reviewed-by: Eike Ziller <eike.ziller@theqtcompany.com>