修改libc_signal.h 该文件中不能用rt_数据类型，否则会引起编译器递归编译

components/libc/getline/posix_getline.h

@@ -14,6 +14,7 @@
 #define POSIX_GETLINE_H
 
 #include <stdio.h>
+#include <sys/types.h>
 
 ssize_t getdelim(char **lineptr, size_t *n, int delim, FILE *stream);
 ssize_t getline(char **lineptr, size_t *n, FILE *stream);