Rename acces to access #209

[denisvasilik]

This pull request is part of issue #209.

[sunfishcode]

This makes sense to me. There's evidence that people commonly spell this one access despite the POSIX spelling:

https://lore.kernel.org/patchwork/patch/1003891/
https://lore.kernel.org/patchwork/patch/1079508/
https://lkml.org/lkml/2019/5/27/185

Of course, WASI libc will need to continue to expose this as EACCES, because that is the POSIX name. So the primary effect of this name change will be to make the documentation more clear, but that seems worth it to me here.

[sunfishcode]

Thanks!