eject: use u-a for /usr/bin/volname
eject: use u-a for /usr/bin/volname

* resolves conflict with latest busybox

Signed-off-by: Martin Jansa <516df3ff67e1fa5d153800b15fb204c0a1a389dc@gmail.com>
Acked-by: Koen Kooi <42e3d96910f922bdd7dd1805fe3f8aff634f391d@openembedded.org>

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