[Toybox] [PATCH] hostname: fix tests for non-root on Android.

[enh]

On Android you can't even get the hostname unless you're root, to avoid
device fingerprinting/tracking.

Also modernize by using skipnot, which fixes the incorrect test name in
the SKIP: output.
---
 tests/hostname.test | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)
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