Properly process nested try and loop blocks

KT-3894: Loops and finally: finally block executed twice when break and return exists in try/finally block
KT-3874: Compilation error on try catch block contains break and continue
KT-3869: Loops and finally: outer finally block not run

 #KT-3869 Fixed
 #KT-3894 Fixed
 #KT-3874 Fixed

compiler/testData/codegen/box/finally/tryLoopTry.kt

@@ -0,0 +1,36 @@
+//test for appropriate
+
+class MyString {
+    var s = ""
+    fun plus(x : String) : MyString {
+        s += x
+        return this
+    }
+
+    fun toString(): String {
+        return s
+    }
+}
+
+
+fun test1() : MyString {
+    var r = MyString()
+    try {
+        r + "Try1"
+        for(i in 1..1) {
+            try {
+                r + "Try2"
+            } finally {
+                return r + "Finally2"
+            }
+        }
+
+    } finally {
+        r + "Finally1"
+    }
+    return r  + "Fail"
+}
+
+fun box(): String {
+  return if (test1().toString() == "Try1Try2Finally2Finally1") "OK" else "fail: ${test1()}"
+}