New review comment by Logarithmus on void-packages repository

https://github.com/void-linux/void-packages/pull/31706#discussion_r668754669

Comment:
@ericonr `musl`'s `limits.h` defines `PAGE_SIZE`, but `glibc`'s doesn't. `mold` author didn't know about that and assuming `PAGE_SIZE` is undefined, he named his variable the same way. That's one of the causes of `musl` build failing. This will be fixed in upstream surely, it's just a temporary workaround (this PR is still draft after all).