setup.py: Install CSS files.

Fixes [setools 4.5.0] apol.css is missing from the Python package #124

Signed-off-by: Chris PeBenito <chpebeni@linux.microsoft.com>

Author: pebenito

setup.py

@@ -75,7 +75,7 @@
                 'setoolsgui.widgets.models', 'setoolsgui.widgets.views'],
       scripts=['apol', 'sediff', 'seinfo', 'seinfoflow', 'sesearch', 'sedta', 'sechecker'],
       data_files=installed_data,
-      package_data={'': ['*.html'],
+      package_data={'': ['*.css', '*.html'],
                     'setools': ['perm_map', 'policyrep.pyi', 'py.typed']},
       ext_modules=cythonize(ext_py_mods, include_path=['setools/policyrep'],
                             annotate=cython_annotate,