if when we need to determine if getauxval sets errno, we determine it doesn't
after getting a 0 return code, make sure we return a value, since we didn't
previously. fall through to code we'd otherwise have called in this case
above.
if defined(HAVE_GETAUXVAL) && !defined(GETAUXVAL_SETS_ERRNO) the
stack variable declaration for 'a' is missing:
const auxv_t *a
Declare 'a' so that Heimdal can build again.
Change-Id: If64dd497f240688b76f3dd6139ac68c2ff149a0e
