update: rename LOS_BackTraceInit

change function name LOS_BackTraceInit and involve it in los_init.c when macro is not set to 0

close https://gitee.com/openharmony/kernel_liteos_m/issues/I3SYQQ

Signed-off-by: kenneth <459864689@qq.com>

components/backtrace/los_backtrace.c

@@ -407,7 +407,7 @@ VOID LOS_BackTrace(VOID)
     PRINTK("----- traceback end -----\r\n");
 }
 
-VOID LOS_BackTraceInit(VOID)
+VOID OSBackTraceInit(VOID)
 {
     OsBackTraceHookSet(LOS_RecordLR);
 }