jna/native

--- libffi notes ---

The libffi subdirectory is managed as a subtree.  Use subtree merging

to update from upstream, e.g.



$ git pull -s subtree libffi master (or other branch, if necessary)



The libffi subdirectory was originally mapped as follows:



$ git remote add -f libffi git@github.com:atgreen/libffi.git

$ git merge -s ours --no-commit libffi/master

$ git read-tree --prefix=native/libffi -u libffi/master

$ git commit -m "Merge libffi as subtree"