full-test.sh: Add lib/libtinfow.so.9 to image

libedit.so.8 needs libtinfow.so.9 too, starting in stable/14. so
add it here.

With this I have an image that boots the minimal 'echo success' test for
LinuxBoot on amd64... Though changes for that aren't upstreamed just
yet. They need to be cleaned up a little before I do that. Stay tuned.

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