Get the list of trust stores so they properly packaged when doing a cx_freeze build.

def get_include_files():
    """"Get the list of trust stores so they properly packaged when doing a cx_freeze build.
    """
    plugin_data_files = []
    trust_stores_pem_path = path.join(root_path, 'sslyze', 'plugins', 'utils', 'trust_store', 'pem_files')
    for file in listdir(trust_stores_pem_path):
        file = path.join(trust_stores_pem_path, file)
        if path.isfile(file):  # skip directories
            filename = path.basename(file)
            plugin_data_files.append((file, path.join('pem_files', filename)))
    return plugin_data_files