Enable aarch64 support, add component test framework and test suite (#211)

and refine aot call indirect op

test-tools/component_test/suites/01-life-cycle/test-app/03_event.c

@@ -0,0 +1,53 @@
+/*
+* Copyright (C) 2019 Intel Corporation.  All rights reserved.
+* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+*/
+
+#include "wasm_app.h"
+#include "wa-inc/timer_wasm_app.h"
+#include "wa-inc/request.h"
+
+int num = 0;
+
+void publish_overheat_event()
+{
+    attr_container_t *event;
+
+    event = attr_container_create("event");
+    attr_container_set_string(&event, "warning", "temperature is over high");
+
+    printf("###app publish event begin ###\n");
+
+    api_publish_event("alert/overheat", FMT_ATTR_CONTAINER, event,
+            attr_container_get_serialize_length(event));
+
+    printf("###app publish event end ###\n");
+
+    attr_container_destroy(event);
+}
+
+/* Timer callback */
+void timer1_update(user_timer_t timer)
+{
+    printf("Timer update %d\n", num++);
+    publish_overheat_event();
+}
+
+void start_timer()
+{
+    user_timer_t timer;
+
+    /* set up a timer */
+    timer = api_timer_create(1000, true, false, timer1_update);
+    api_timer_restart(timer, 1000);
+}
+
+void on_init()
+{
+    start_timer();
+}
+
+void on_destroy()
+{
+    /* real destroy work including killing timer and closing sensor is accomplished in wasm app library version of on_destroy() */
+}