fix: add fstatfs api and unitest

add fstatfs api and unitest
Signed-off-by: Nwcc0 <917033401@qq.com>
Change-Id: I82b988a068d46c875ae9cea366261726566660ef

porting/liteos_a/user/src/stat/statvfs.c

-#include <sys/statvfs.h>
-#include <sys/statfs.h>
-#include <unsupported_api.h>
-
-#include "syscall.h"
-
-static int __statfs(const char *path, struct statfs *buf)
-{
-	*buf = (struct statfs){0};
-#ifdef SYS_statfs64
-	return syscall(SYS_statfs64, path, sizeof *buf, buf);
-#else
-	return syscall(SYS_statfs, path, buf);
-#endif
-}
-
-static int __fstatfs(int fd, struct statfs *buf)
-{
-	unsupported_api(__FUNCTION__);
-	*buf = (struct statfs){0};
-#ifdef SYS_fstatfs64
-	return syscall(SYS_fstatfs64, fd, sizeof *buf, buf);
-#else
-	return syscall(SYS_fstatfs, fd, buf);
-#endif
-}
-
-weak_alias(__statfs, statfs);
-weak_alias(__fstatfs, fstatfs);
-
-static void fixup(struct statvfs *out, const struct statfs *in)
-{
-	*out = (struct statvfs){0};
-	out->f_bsize = in->f_bsize;
-	out->f_frsize = in->f_frsize ? in->f_frsize : in->f_bsize;
-	out->f_blocks = in->f_blocks;
-	out->f_bfree = in->f_bfree;
-	out->f_bavail = in->f_bavail;
-	out->f_files = in->f_files;
-	out->f_ffree = in->f_ffree;
-	out->f_favail = in->f_ffree;
-	out->f_fsid = in->f_fsid.__val[0];
-	out->f_flag = in->f_flags;
-	out->f_namemax = in->f_namelen;
-}
-
-int statvfs(const char *restrict path, struct statvfs *restrict buf)
-{
-	struct statfs kbuf;
-	if (__statfs(path, &kbuf)<0) return -1;
-	fixup(buf, &kbuf);
-	return 0;
-}
-
-int fstatvfs(int fd, struct statvfs *buf)
-{
-	struct statfs kbuf;
-
-	unsupported_api(__FUNCTION__);
-	if (__fstatfs(fd, &kbuf)<0) return -1;
-	fixup(buf, &kbuf);
-	return 0;
-}
-
-weak_alias(statvfs, statvfs64);
-weak_alias(statfs, statfs64);
-weak_alias(fstatvfs, fstatvfs64);
-weak_alias(fstatfs, fstatfs64);

porting/liteos_a/user/src/unistd/renameat.c

-#include <stdio.h>
-#include <unsupported_api.h>
-
-#include "syscall.h"
-
-int renameat(int oldfd, const char *old, int newfd, const char *new)
-{
-	unsupported_api(__FUNCTION__);
-#ifdef SYS_renameat
-	return syscall(SYS_renameat, oldfd, old, newfd, new);
-#else
-	return syscall(SYS_renameat2, oldfd, old, newfd, new, 0);
-#endif
-}