making naked attr generally available

[Martin v. Loewis]

> In the case of (1), we should write the _init and _fini functions to
> process .ctors and .dtors as one unit.

As a side note: Using DT_FINI_ARRAY for .dtors is probably wrong (as
is having .dtors in the first place) - at least for C++. In general,
this technique can't guarantee that destruction is in reverse order
from construction.

Regards,
Martin