runtime/internal/lib/os: fix readdir for darwin-amd64

runtime/internal/clite/os/dir_darwin_amd64.go

@@ -0,0 +1,17 @@
+package os
+
+import (
+	_ "unsafe"
+
+	c "github.com/goplus/llgo/runtime/internal/clite"
+	"github.com/goplus/llgo/runtime/internal/clite/syscall"
+)
+
+//go:linkname Fdopendir C.fdopendir$INODE64
+func Fdopendir(fd c.Int) *DIR
+
+//go:linkname Readdir C.readdir$INODE64
+func Readdir(dir *DIR) *syscall.Dirent
+
+//go:linkname Fstatat C.fstatat$INODE64
+func Fstatat(dirfd c.Int, path *c.Char, buf *StatT, flags c.Int) c.Int