update match ARM with L4Bender variant

Author: humenda

compiler/rustc_codegen_ssa/src/back/link.rs

@@ -1184,6 +1184,7 @@ pub fn linker_and_flavor(sess: &Session) -> (PathBuf, LinkerFlavor) {
                     LinkerFlavor::Lld(_) => "lld",
                     LinkerFlavor::PtxLinker => "rust-ptx-linker",
                     LinkerFlavor::BpfLinker => "bpf-linker",
+                    LinkerFlavor::L4Bender => "l4-bender",
                 }),
                 flavor,
             )),

compiler/rustc_codegen_ssa/src/back/linker.rs

@@ -1401,7 +1401,7 @@ impl<'a> Linker for L4Bender<'a> {
 
     fn group_start(&mut self) { self.cmd.arg("--start-group"); }
     fn group_end(&mut self) { self.cmd.arg("--end-group"); }
-    fn cross_lang_lto(&mut self) {
+    fn linker_plugin_lto(&mut self) {
         // do nothing
     }
 }

library/std/src/sys/unix/l4re.rs

@@ -481,7 +481,7 @@ pub mod net {
 
     impl LookupHost {
         pub fn port(&self) -> u16 {
-            unimpl!();
+            0 // unimplemented
         }
     }