compiletest: don't use `std::io::stdout()`, as it bypasses `set_print`.
compiletest: don't use `std::io::stdout()`, as it bypasses `set_print`.

graydon/rust,aidancully/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,aidancully/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust