More conditional dependencies.

More conditional dependencies.

* modules/faccessat (Depends-on): Add conditions.
* modules/fchmodat (Depends-on): Likewise.
* modules/fchownat (Depends-on): Likewise.
* modules/fstatat (Depends-on): Likewise.
* modules/mkfifoat (Depends-on): Likewise.
* modules/readlinkat (Depends-on): Likewise.
* modules/symlinkat (Depends-on): Likewise.
* modules/unlinkat (Depends-on): Likewise.
* modules/utimensat (Depends-on): Likewise.
* modules/mkdirat (Depends-on): Add sys_stat. Add conditions.
* modules/linkat (Depends-on): Refine the conditions.
* modules/renameat (Depends-on): Likewise.