[Toybox] [PATCH] Add rtcwake.

[Rob Landley]

On 4/1/20 2:35 PM, enh via Toybox wrote:
> Some of the bringup folks are debugging RTC issues and asked for this.

I tweaked it slightly and promoted it (minor stuff: put alarm in half of toybuf
so it doesn't need the memset, the type of # arguments is actually long not long
long, removed curly brackets around single line if bodies, and I went ahead and
leaked fd at the end because eh).

I don't _think_ I broke anything, but I don't have any test cases for this command?

Rob