[2.7] bpo-32521: nis libnsl (GH-5190) (#5353)

The nismodule is now compatible with new libnsl and headers location

Signed-off-by: Christian Heimes <christian@python.org>.
(cherry picked from commit 29a7df78277447cf6b898dfa0b1b42f8da7abc0c)
2 files changed