libarchive: fix compilation on newer HP-UX versions

Newer HP-UX versions (e.g. 11.31) also offers F_SETTIMES, but with a different
struct for the timing information.

Suggested-by: Eric Berge <ericmberge@gmail.com>
Merge topic 'hpux-libarchive-compile' into next

5e0b060a libarchive: fix compilation on newer HP-UX versions