fix(ld.so): do not depend on TLS at all

In the next big refactor (next PR), all of the platform functionality
used by both relibc and ld.so will be moved into a `platform`/`sysdeps`
crate and then ld.so would be moved out of relibc and not link with it.

I think doing it in a seperate PR would make it more managable, as when
I did half of it, the diff was pretty huge and that way it would be
easier to review too :)

Signed-off-by: Anhad Singh <andypython@protonmail.com>

src/header/stdio/mod.rs

@@ -852,7 +852,7 @@ pub unsafe extern "C" fn perror(s: *const c_char) {
     } else {
         "Unknown error"
     };
-    let mut w = platform::FileWriter(2);
+    let mut w = platform::FileWriter::new(2);
 
     // The prefix, `s`, is optional (empty or NULL) according to the spec
     match CStr::from_nullable_ptr(s).and_then(|s_cstr| str::from_utf8(s_cstr.to_bytes()).ok()) {