Update tests.

Author: m-ou-se

tests/ui/associated-types/issue-91231.rs

@@ -3,7 +3,7 @@
 #![feature(extern_types)]
 #![allow(dead_code)]
 
-extern {
+extern "C" {
     type Extern;
 }
 

tests/ui/attributes/key-value-expansion.rs

@@ -39,7 +39,7 @@ bug!();
 macro_rules! doc_comment {
     ($x:expr) => {
         #[doc = $x]
-        extern {}
+        extern "C" {}
     };
 }
 

tests/ui/borrowck/issue-92157.rs

@@ -5,7 +5,7 @@
 
 #[cfg(target_os = "linux")]
 #[link(name = "c")]
-extern {}
+extern "C" {}
 
 #[lang = "start"]
 fn start<T>(_main: fn() -> T, _argc: isize, _argv: *const *const u8) -> isize {

tests/ui/coherence/coherence-negative-impls-copy.rs

@@ -18,7 +18,7 @@ impl !Copy for WithDrop {}
 
 struct Type;
 trait Trait {}
-extern {
+extern "C" {
     type ExternType;
 }
 

tests/ui/conditional-compilation/cfg_accessible-not_sure.rs

@@ -63,7 +63,7 @@ const B: bool = true;
 
 // ForeignType::unresolved - error
 
-extern {
+extern "C" {
     type ForeignType;
 }
 

tests/ui/consts/const-eval/validation-ice-extern-type-field.rs

@@ -1,6 +1,6 @@
 #![feature(extern_types)]
 
-extern {
+extern "C" {
     type Opaque;
 }
 

tests/ui/delegation/glob-non-impl.rs

@@ -11,7 +11,7 @@ trait OtherTrait {
     reuse Trait::*; //~ ERROR glob delegation is only supported in impls
 }
 
-extern {
+extern "C" {
     reuse Trait::*; //~ ERROR delegation is not supported in `extern` blocks
 }
 

tests/ui/extern/extern-type-diag-not-similar.rs

@@ -4,11 +4,11 @@
 // because they are both extern types.
 
 #![feature(extern_types)]
-extern {
+extern "C" {
     type ShouldNotBeMentioned;
 }
 
-extern {
+extern "C" {
     type Foo;
 }
 

tests/ui/extern/issue-10025.rs

@@ -1,6 +1,6 @@
 //@ run-pass
 //@ pretty-expanded FIXME #23616
-#![allow(dead_code)]
+#![allow(dead_code, missing_abi)]
 
 unsafe extern fn foo() {}
 unsafe extern "C" fn bar() {}

tests/ui/extern/issue-95829.rs

@@ -1,6 +1,6 @@
 //@ edition:2018
 
-extern {
+extern "C" {
     async fn L() { //~ ERROR: incorrect function inside `extern` block
         //~^ ERROR: functions in `extern` blocks cannot have `async` qualifier
         async fn M() {}