With this patch ClangCodeModel can properly
handle static overloads together with non-static ones.
Code completion still might crash - requires another patch.
Task-number: QTCREATORBUG-19184
Change-Id: I12f0e8cb56b3bed3f5ca1f7a9fe4ca3932b78125
Reviewed-by: Eike Ziller <eike.ziller@qt.io>
