Primary constructor generation.

compiler/testData/ir/irText/expressions/arrayAugmentedAssignment1.txt

@@ -12,7 +12,12 @@ FILE /arrayAugmentedAssignment1.kt
       RETURN type=kotlin.Nothing
         CONST Int type=kotlin.Int value='42'
   CLASS CLASS C
+    FUN public constructor C(/*0*/ x: kotlin.IntArray)
+      BLOCK_BODY
+        INITIALIZE_PROPERTY x
     PROPERTY public final val x: kotlin.IntArray getter=null setter=null
+      EXPRESSION_BODY
+        GET_VAR x type=kotlin.IntArray operator=INITIALIZE_PROPERTY_FROM_PARAMETER
   FUN public fun testVariable(): kotlin.Unit
     BLOCK_BODY
       VAR var x: kotlin.IntArray