Nuclei: Change idle stack size from 256 to 396 bytes

If changed to 396 bytes, then debug optimization level changed
from O2 to O0, and the application can run successfully without
stack overflow issue of tidle0 task
warning: tidle0 stack is close to end of stack address.

Signed-off-by: Huaqi Fang <578567190@qq.com>

bsp/nuclei/gd32vf103_rvstar/.config

@@ -19,7 +19,7 @@ CONFIG_RT_USING_OVERFLOW_CHECK=y
 CONFIG_RT_USING_HOOK=y
 CONFIG_RT_USING_IDLE_HOOK=y
 CONFIG_RT_IDLE_HOOK_LIST_SIZE=4
-CONFIG_IDLE_THREAD_STACK_SIZE=256
+CONFIG_IDLE_THREAD_STACK_SIZE=396
 CONFIG_RT_USING_TIMER_SOFT=y
 CONFIG_RT_TIMER_THREAD_PRIO=4
 CONFIG_RT_TIMER_THREAD_STACK_SIZE=512

bsp/nuclei/gd32vf103_rvstar/rtconfig.h

@@ -15,7 +15,7 @@
 #define RT_USING_HOOK
 #define RT_USING_IDLE_HOOK
 #define RT_IDLE_HOOK_LIST_SIZE 4
-#define IDLE_THREAD_STACK_SIZE 256
+#define IDLE_THREAD_STACK_SIZE 396
 #define RT_USING_TIMER_SOFT
 #define RT_TIMER_THREAD_PRIO 4
 #define RT_TIMER_THREAD_STACK_SIZE 512

bsp/nuclei/gd32vf103_rvstar/rtconfig.py

@@ -47,7 +47,7 @@ if PLATFORM == 'gcc':
     LPATH   = ''
 
     if BUILD == 'debug':
-        CFLAGS += ' -O2 -ggdb'
+        CFLAGS += ' -O0 -ggdb'
         AFLAGS += ' -ggdb'
     else:
         CFLAGS += ' -O2 -Os'