fix relative path to loader .so in setup.py

setup.py

@@ -74,7 +74,7 @@
       packages=find_packages(exclude=["tests"]),
       package_data={'neon': ['backends/kernels/sass/*.sass',
                              'backends/kernels/cubin/*.cubin',
-                             'data/*.so']},
+                             'data/loader/*.so']},
       classifiers=['Development Status :: 3 - Alpha',
                    'Environment :: Console',
                    'Environment :: Console :: Curses',