test: add labels and breaks count tests.

js/js.translator/testData/box/inline/jsCodeVarDeclared.kt

@@ -7,6 +7,8 @@ package foo
 
 internal inline fun sum(x: Int, y: Int): Int = js("var a = x; a + y")
 
+// CHECK_BREAKS_COUNT: function=test count=0 TARGET_BACKENDS=JS_IR
+// CHECK_LABELS_COUNT: function=test name=$l$block count=0 TARGET_BACKENDS=JS_IR
 internal fun test(x: Int, y: Int): Int {
     val xx = sum(x, x)
     js("var a = 0;")