improved processing of local declarations in cfg construction

compiler/testData/cfg/LocalDeclarations.jet

@@ -0,0 +1,77 @@
+class C() {
+    val a: Int = 1
+
+    class object {
+        val x : Int
+
+        {
+            $x = 1
+        }
+
+
+        fun foo() {
+            val b : Int = 1
+            doSmth(b)
+        }
+    }
+}
+
+fun doSmth(i: Int) {}
+
+fun test1() {
+    val a = object {
+        val x : Int
+        {
+            $x = 1
+        }
+    }
+}
+
+object O {
+    val x : Int
+    {
+        $x = 1
+    }
+}
+
+fun test2() {
+    val b = 1
+    val a = object {
+        val x = b
+    }
+}
+fun test3() {
+    val a = object {
+        val y : Int
+        fun inner_bar() {
+            y = 10
+        }
+    }
+}
+fun test4() {
+    val a = object {
+        val x : Int
+        val y : Int
+        {
+            $x = 1
+        }
+        fun ggg() {
+            y = 10
+        }
+    }
+}
+
+fun test5() {
+    val a = object {
+        var x = 1
+        {
+            $x = 2
+        }
+        fun foo() {
+            x = 3
+        }
+        fun bar() {
+            x = 4
+        }
+    }
+}