Catch test functions defined with function-like macros.
To speed-up semantic analysis, find usages does not expand function-like
macros.
Semantic fails with "expected a function declarator" on such functions
and skips function body.
To avoid that, we create dummy function type specifically for this case
Change-Id: Ie2f2464ee57aa4dc86eed07b8b699458f95c0266
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>