Use class name as secondary constructor name

compiler/testData/cfg/secondaryConstructors/withPrimarySuper.values

@@ -54,7 +54,7 @@ z = 8              !<v16>: *
 y = 9              !<v19>: *
 { y = 9 }          !<v19>: *    COPY
 =====================
-== <init> ==
+== A ==
 constructor(): this('a') {
         y = 2
     }
@@ -66,7 +66,7 @@ this('a')   <v1>: *      NEW: call(this('a'), <init>|<v0>) -> <v1>
 y = 2       !<v4>: *
 { y = 2 }   !<v4>: *     COPY
 =====================
-== <init> ==
+== A ==
 constructor(a: Int, b: Int = 3): this(b.toChar()) {
         y = x
     }