Update ar_archive_writer to 0.2.0

This adds a whole bunch of tests checking for any difference with llvm's
archive writer. It also fixes two mistakes in the porting from C++ to
Rust. The first one causes a divergence for Mach-O archives which may or
may not be harmless. The second will definitively cause issues, but only
applies to thin archives, which rustc currently doesn't create.

Cargo.lock

@@ -210,9 +210,9 @@ dependencies = [
 
 [[package]]
 name = "ar_archive_writer"
-version = "0.1.5"
+version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9792d37ca5173d7e7f4fe453739a0671d0557915a030a383d6b866476bbc3e71"
+checksum = "f0c269894b6fe5e9d7ada0cf69b5bf847ff35bc25fc271f08e1d080fce80339a"
 dependencies = [
  "object 0.32.2",
 ]

compiler/rustc_codegen_ssa/Cargo.toml

@@ -5,7 +5,7 @@ edition = "2021"
 
 [dependencies]
 # tidy-alphabetical-start
-ar_archive_writer = "0.1.5"
+ar_archive_writer = "0.2.0"
 bitflags = "2.4.1"
 cc = "1.0.90"
 itertools = "0.12"

compiler/rustc_codegen_ssa/src/back/archive.rs

@@ -285,14 +285,7 @@ impl<'a> ArArchiveBuilder<'a> {
             .tempfile_in(output.parent().unwrap_or_else(|| Path::new("")))
             .map_err(|err| io_error_context("couldn't create a temp file", err))?;
 
-        write_archive_to_stream(
-            archive_tmpfile.as_file_mut(),
-            &entries,
-            true,
-            archive_kind,
-            true,
-            false,
-        )?;
+        write_archive_to_stream(archive_tmpfile.as_file_mut(), &entries, archive_kind, false)?;
 
         let any_entries = !entries.is_empty();
         drop(entries);