Properties declared in primary constructors should have proper accessors in IR.

compiler/testData/ir/irText/classes/initBlock.txt

@@ -16,6 +16,11 @@ FILE /initBlock.kt
       FIELD public final val x: kotlin.Int
         EXPRESSION_BODY
           GET_VAR 'value-parameter x: Int' type=kotlin.Int operator=INITIALIZE_PROPERTY_FROM_PARAMETER
+      FUN public final fun <get-x>(): kotlin.Int
+        BLOCK_BODY
+          RETURN type=kotlin.Nothing from='<get-x>(): Int'
+            GET_BACKING_FIELD 'x: Int' type=kotlin.Int operator=null
+              receiver: THIS of 'Test2' type=Test2
     ANONYMOUS_INITIALIZER Test2
       BLOCK_BODY
         CALL 'println(): Unit' type=kotlin.Unit operator=null