JS: don't mark access to captured var as pure

See KT-19108

js/js.translator/testData/box/inlineEvaluationOrder/capturedVarAsArgument.kt

@@ -0,0 +1,18 @@
+// EXPECTED_REACHABLE_NODES: 996
+var log = ""
+
+inline fun foo(x: Int, action: (Int) -> Unit) = action(x)
+
+fun box(): String {
+    var x = 23
+    foo(x) {
+        log += "$it;"
+        x++
+        log += "$it;"
+    }
+
+    if (log != "23;23;") return "fail1: $log"
+    if (x != 24) return "fail2: $x"
+
+    return "OK"
+}