Re: v1.2 fails to compile "==" for standalone & gc=none

[leorize]

`--os:standalone` has been deprecated I think, the replacement is now 
`--os:any`: 
[https://nim-lang.org/docs/nimc.html#nim-for-embedded-systems](https://nim-lang.org/docs/nimc.html#nim-for-embedded-systems)