fix: allow selinux on android

[xtqqczze]

Since 0.5.2 selinux crate supports android

[github-actions]

GNU testsuite comparison:

GNU test failed: tests/sort/sort-debug-keys. tests/sort/sort-debug-keys is passing on 'main'. Maybe you have to rebase?
Skipping an intermittent issue tests/shuf/shuf-reservoir (passes in this run but fails in the 'main' branch)
Skipping an intermittent issue tests/sort/sort-stale-thread-mem (passes in this run but fails in the 'main' branch)
Congrats! The gnu test tests/env/env-signal-handler is now passing!

[github-actions]

GNU testsuite comparison:

Skip an intermittent issue tests/tty/tty-eof (fails in this run but passes in the 'main' branch)
Note: The gnu test tests/tail/tail-n0f is now being skipped but was previously passing.

[cakebaker]

Thanks!

[xtqqczze]

@cakebaker I wonder if we could simplify #[cfg()] checks:

cfg_aliases::cfg_aliases! {
    selinux: { all(feature = "selinux", any(target_os = "android", target_os = "linux")) },
}

https://github.com/xtqqczze/uutils-coreutils/tree/wip/cfg-selinux