[修改] 增加freeRTOS

1. 版本FreeRTOSv202212.01，命名为kernel；

kernel/FreeRTOS-Plus/Source/AWS/ota/source/include/stdbool.readme

@@ -0,0 +1,30 @@
+#ifndef _STDBOOL_H
+#define _STDBOOL_H
+
+/*******************************************************************************
+ * This file contains the definitions specified in stdbool.h. It is provided to
+ * allow OTA to be built using compilers that do not provide their own
+ * stdbool.h defintion.
+ *
+ * To use this file:
+ *
+ *    1) Copy this file into a directory that is in your compiler's include path.
+ *       The directory must be part of the include path for system header files,
+ *       for example passed using gcc's "-I" or "-isystem" options.
+ *
+ *    2) Rename the copied file stdbool.h.
+ *
+ */
+
+#ifndef __cplusplus
+
+/* _Bool was introduced in C99. */
+    #define bool     int
+    #define false    0
+    #define true     1
+
+#endif
+
+#define __bool_true_false_are_defined    1
+
+#endif /* _STDBOOL_H */