libnewt/libnewt-python: upgrade to 0.52.17

libnewt/libnewt-python: upgrade to 0.52.17

- The company address has changed in COPYING.

- Rebase fix_SHAREDDIR.patch to 0.52.17

- Rebase cross_ar.patch to 0.52.17

- Obsolete fix_python_fpic.patch, since the patch has been
  merged by upstream;

- The upstream rename snackmodule to snack in 0.52.17, so tweak
  libnewt-python_0.52.17.bb;

Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>