Report tunable costs for more formats, remove unused fields from salt definitions,  fix a typo in a comment,

see commit messages of individual commits.

SKEY changes had not been tested, since I don't have a system where I can enable HAVE_SKEY and don't know what to install to make it work.
But I think I got this one correct nevertheless.
(Just in case I didn't, it is a separate commit, so reverting the change is trivial.)

7z-opencl is in src/broken, that's why it wouldn't even compile for FMT_MAIN_VERSION > 11, fixed now (in a separate commit as well).
Android FDE and blackberry hat salt definitions which included components named iterations (and other unneeded fields). I removed these fields since they are not needed and did cause confusion, at least for me.