LockPerf benchmark and related fixes (try/break/continue interoperability)

compiler/testData/codegen/regressions/kt496.jet

@@ -41,12 +41,48 @@ fun test4() : Int {
     }
 }
 
+fun test5() : Int {
+    var x = 0
+    System.out?.println("test 5")
+    while(true) {
+        System.out?.println(x)
+        try {
+            if(x < 10)
+                x++
+            else
+                break
+        }
+        finally {
+            x++
+        }
+    }
+    return x
+}
+
+fun test6() : Int {
+    var x = 0
+    System.out?.println("test 6")
+    while(x < 10) {
+        System.out?.println(x)
+        try {
+            x++
+            continue
+        }
+        finally {
+            x++
+        }
+    }
+    return x
+}
+
 fun box() : String {
     if(test1()) return "test1 failed"
     if(test2()) return "test2 failed"
     if(test3() != 2) return "test3 failed"
     System.out?.println(test4())
     if(test4() != 3) return "test4 failed"
+    if(test5() != 11) return "test5 failed"
+    if(test6() != 10) return "test6 failed"
 
     return "OK"
 }