Adapt to new version of ctest

Author: bachp

libc-test/build.rs

@@ -344,7 +344,7 @@ fn main() {
         }
     }
 
-    cfg.type_name(move |ty, is_struct| {
+    cfg.type_name(move |ty, is_struct, is_union| {
         match ty {
             // Just pass all these through, no need for a "struct" prefix
             "FILE" |
@@ -823,7 +823,7 @@ fn main() {
         cfg.skip_struct(|s| {
             s != "termios2"
         });
-        cfg.type_name(move |ty, is_struct| {
+        cfg.type_name(move |ty, is_struct, is_union| {
             match ty {
                 t if is_struct => format!("struct {}", t),
                 t => t.to_string(),