Fix closure's reference to outer closure

#KT-3276 Fixed

compiler/testData/codegen/box/closures/closureInsideClosure/localFunInsideLocalFun.kt

@@ -0,0 +1,13 @@
+fun box(): String {
+    fun rec(n : Int) {
+        fun x(m : Int) {
+            if (n > 0) rec(n - 1)
+        }
+
+        x(0)
+    }
+
+    rec(5)
+    
+    return "OK"
+}

compiler/testData/codegen/box/closures/closureInsideClosure/localFunInsideLocalFunDifferentSignatures.kt

@@ -0,0 +1,13 @@
+fun box(): String {
+    fun rec(n : Int) {
+        fun x(m : Int, k : Int) {
+            if (n > 0) rec(n - 1 + k)
+        }
+
+        x(0, 0)
+    }
+
+    rec(5)
+    
+    return "OK"
+}

compiler/testData/codegen/box/closures/closureInsideClosure/threeLevels.kt

@@ -0,0 +1,17 @@
+fun box(): String {
+    fun foo(x: Int) {
+        fun bar(y: Int) {
+            fun baz(z: Int) {
+                foo(x - 1)
+            }
+            
+            baz(y)
+        }
+        
+        if (x > 0) bar(x)
+    }
+    
+    foo(1)
+    
+    return "OK"
+}

compiler/testData/codegen/box/closures/closureInsideClosure/threeLevelsDifferentSignatures.kt

@@ -0,0 +1,16 @@
+fun box(): String {
+    fun foo(x: Int, s: String): String {
+        fun bar(y: Int) {
+            fun baz(z: Int, k: Int) {
+                foo(x - 1 + k, "Fail")
+            }
+            
+            baz(y, 0)
+        }
+        
+        if (x > 0) bar(x)
+        return s
+    }
+    
+    return foo(1, "OK")
+}

compiler/testData/codegen/box/closures/closureInsideClosure/varAsFunInsideLocalFun.kt

@@ -0,0 +1,15 @@
+//KT-3276
+
+fun box(): String {
+    fun rec(n : Int) {
+        val x = { (m : Int) ->
+            if (n > 0) rec(n - 1)
+        }
+
+        x(0)
+    }
+
+    rec(5)
+    
+    return "OK"
+}