Test Description

This is a pthread test example.

Requirement Components:
1. replace main.c
2. Add pthread test example *.c
3. Add posix api
   \component\os\freertos\posix
4. add include directory
   $PROJ_DIR$\..\..\..\component\os\freertos\posix\lib\include\FreeRTOS_POSIX
   $PROJ_DIR$\..\..\..\component\os\freertos\posix\lib\FreeRTOS-Plus-POSIX\include\portable\realtek\rtl8195
   $PROJ_DIR$\..\..\..\component\os\freertos\posix\lib\include
   $PROJ_DIR$\..\..\..\component\os\freertos\posix\lib\FreeRTOS-Plus-POSIX\include
   $PROJ_DIR$\..\..\..\component\os\freertos\posix\lib\include\private

