[Toybox] [BUG] ls applet ignores options if CONFIG_LS_COLOR is not set

[darken]

If `CONFIG_LS_COLOR` is not set the `ls` applet doesn't take options and
either ignores them or says `ls: Unknown option...`.

Some testoutput:
https://github.com/landley/toybox/issues/57

Seems to be caused by commit:
https://github.com/landley/toybox/commit/48c75324f758e77ca3ba64072a48a7407e765570
Reverting it fixes this.

~Matthias
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