Update comment and remove special-case for Wasm targets which is incompatible with response-file changes

Author: rcxdude

compiler/rustc_codegen_ssa/src/back/command.rs

@@ -100,12 +100,6 @@ impl Command {
             Program::Lld(ref p, flavor) => {
                 let mut c = process::Command::new(p);
                 c.arg("-flavor").arg(flavor.as_str());
-                if let LldFlavor::Wasm = flavor {
-                    // LLVM expects host-specific formatting for @file
-                    // arguments, but we always generate posix formatted files
-                    // at this time. Indicate as such.
-                    c.arg("--rsp-quoting=posix");
-                }
                 c
             }
         };

compiler/rustc_codegen_ssa/src/back/link.rs

@@ -1609,7 +1609,7 @@ fn exec_linker(
         args.push_str(
             &Escape {
                 arg: arg.to_str().unwrap(),
-                // LLD also uses MSVC-like parsing for @-files on windows
+                // LLD also uses MSVC-like parsing for @-files by default when running on windows hosts
                 is_like_msvc: sess.target.is_like_msvc || (cfg!(windows) && flavor.uses_lld()),
             }
             .to_string(),