New review comment by ericonr on void-packages repository

https://github.com/void-linux/void-packages/pull/26965#discussion_r539544320

Comment:
```suggestion
		vsed -e '/Check if a minimal SpiderMonkey program compiles/,/^endif/d' -i meson.build
```

And I don't think this needs to be avoided only for cross if you want to remove the conditional.