unix: remove raw syscall from Getfsstat

Use libc version instead.

Update golang/go#17490

Change-Id: Ibcedccb9715961904d12fc85f69a7139b6c26658
Reviewed-on: https://go-review.googlesource.com/c/154660
Reviewed-by: Ian Lance Taylor <iant@golang.org>
diff --git a/unix/zsyscall_darwin_arm64.s b/unix/zsyscall_darwin_arm64.s
index c76ebd3..53a47d9 100644
--- a/unix/zsyscall_darwin_arm64.s
+++ b/unix/zsyscall_darwin_arm64.s
@@ -266,6 +266,8 @@
 	JMP	libc_fstatat(SB)
 TEXT ·libc_fstatfs_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_fstatfs(SB)
+TEXT ·libc_getfsstat_trampoline(SB),NOSPLIT,$0-0
+	JMP	libc_getfsstat(SB)
 TEXT ·libc_lstat_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_lstat(SB)
 TEXT ·libc_stat_trampoline(SB),NOSPLIT,$0-0