- change OSAL_TASK_FUNCTION to have void* parameter (to be consistent with most popular RTOS)

- add new error enum TUSB_ERROR_OSAL_TASK_CREATE_FAILED
- move usbh_enumeration_task prototype to usbh.h
- change OSAL_SUBTASK_INVOKED_AND_WAIT behavior, will not "return" in calling task when subtask got error status.
calling task need to do that after the call
- osal_queue_receive signature from uint32_t* to void*

- implement osal_freertos.h for FreeRTOS 7.3 --> able to compile & build host_freertos
+ OSAL_TASK_FUNCTION
+ turn on FPU for M4 in both host_os_none & host_freertos (freertos requires FPU to be on to compile)
+ osal_task_create
+ OSAL_SUBTASK_INVOKED_AND_WAIT
+ SUBTASK_ASSERT
+ osal_semaphore_reset
+ osal_queue_flush
+ adding heap_1.c for memory management

demos/host/src/keyboard_app.h

@@ -63,7 +63,7 @@
 
 
 void keyboard_app_init(void);
-OSAL_TASK_FUNCTION( keyboard_app_task );
+OSAL_TASK_FUNCTION( keyboard_app_task ) (void* p_task_para);
 
 #ifdef __cplusplus
  }