import-checker: fix test to make a real package
Otherwise "testpackage" wouldn't be counted as a package when building a
list of imported symbols.
# See http://EditorConfig.org for the specification
root = true
[*.py]
indent_size = 4
indent_style = space
trim_trailing_whitespace = true
[*.{c,h}]
indent_size = 8
indent_style = tab
trim_trailing_whitespace = true