[Toybox] [PATCH] Shut up egrep instead of replacing it

[Oliver Webb]

In a thread from just over a month ago, Rob suggested adding 2>/dev/null in calls
to egrep to shut up warnings instead of replace it and bow down to the FSF.

http://lists.landley.net/pipermail/toybox-landley.net/2024-February/030030.html

"can I just defer this until it's actually _removed_ not
deprecated and thus actually breaks builds rather than produces stupid warnings?
Is egrep 2>/dev/null a reasonable option in the short term?"

The following patch does this and gets rid of warnings when building on arch (btw),
and presumably any system with the more recent versions of GNU grep (Mine is 3.11).

-   Oliver Webb <aquahobbyist at proton.me>
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