[gentoo-dev] prune_libtool_files is NOT a direct replacement for, example, find "${D}" -name '*.la' -delete

[Samuli Suominen]

The logic in prune_libtool_files is not perfect[1].

If you are updating ebuild for whatever reason and see `find` command to 
punt .la files, and replace it with prune_libtool_files then you also 
need to build the package (with "every" possible USE flag combination) 
to see if --all argument is also needed.

To clarify:

Use `prune_libtool_files --all` instead of plain `prune_libtool_files` 
if you don't test the package with the USE flags.

Not going to point anyone with a finger but the accident has already 
happened couple of times in tree :P

[1] http://bugs.gentoo.org/421197