KT-17110 Rewrite branches targeting other branches

- Rewrite branches targeting other branches to target directly the
final destination to avoid runtime performance penalties.

Fix of https://youtrack.jetbrains.com/issue/KT-17110

compiler/testData/codegen/bytecodeText/controlStructures/kt17110.kt

@@ -0,0 +1,21 @@
+fun test(x: Int, y: Int): String {
+    var result: String
+    if (x == 6) {
+        if (y == 6) {
+            result = "a"
+        } else {
+            result = "b"
+        }
+    } else {
+        result = "c"
+    }
+    return result
+}
+
+fun box(): String {
+    if (test(9, 10) != "c")
+        return "Failures"
+    return "OK"
+}
+
+// 2 GOTO L7