Apply clang-format for more source files (#795)

Apply clang-format for C source files in folder core/app-mgr,
core/app-framework, and test-tools.
And rename folder component_test to component-test, update
zephyr build document.

Signed-off-by: Wenyong Huang <wenyong.huang@intel.com>

test-tools/component-test/suites/01-life-cycle/test-app/01_install.c

@@ -0,0 +1,19 @@
+/*
+ * Copyright (C) 2019 Intel Corporation.  All rights reserved.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+ */
+
+#include "wasm_app.h"
+
+void
+on_init()
+{
+    printf("Hello, I was installed.\n");
+}
+
+void
+on_destroy()
+{
+    /* real destroy work including killing timer and closing sensor is
+     * accomplished in wasm app library version of on_destroy() */
+}