Some header like windows.h adds dangerous defines which are not used but
break the indexing like "small". We now preinclude them and undefine the
dangerous the defines. This can be used for speed up the indexing as we
could provide stripped headers.
Change-Id: I2a89a4719ada7591e0e7a1ecc411b2e0ffd40d9a
Reviewed-by: Ivan Donchevskii <ivan.donchevskii@qt.io>
3bd653416a