lib: update ABI meta following libspl changes

In theory they should not have resulted in a change. In practice, the
way visibility is set up currently means that many of our convenience
libraries will "leak through" into the available symbols in our public
libraries.

In this commit, we're seeing all the new symbols in libspl through
libuutil, libzfs and libzfs_core. Importantly, none have been removed,
so consumers of these libraries will not notice.

Sponsored-by: https://despairlabs.com/sponsor/
Signed-off-by: Rob Norris <robn@despairlabs.com>

Author: robn