sepolgen: Allow ~ as a file identifier

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This patch looks good to me. acked.

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iEYEARECAAYFAk7dHPUACgkQrlYvE4MpobOR9QCfbZgluxTmvTWJs1HlTjlWkgSF eowAnRFtYuqO20XxzqKeT/IKyx15Lo5J
=BGUB
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