[BZ #5628]
* bits/shm.h: Fix comment describing shmid_ds.
* sysdeps/gnu/bits/shm.h: Likewise.
* sysdeps/unix/sysv/linux/alpha/bits/shm.h: Likewise.
* sysdeps/unix/sysv/linux/bits/shm.h: Likewise.
* sysdeps/unix/sysv/linux/ia64/bits/shm.h: Likewise.
* sysdeps/unix/sysv/linux/powerpc/bits/shm.h: Likewise.
* sysdeps/unix/sysv/linux/s390/bits/shm.h: Likewise.
* sysdeps/unix/sysv/linux/sh/bits/shm.h: Likewise.
* sysdeps/unix/sysv/linux/sparc/bits/shm.h: Likewise.
* sysdeps/unix/sysv/linux/x86_64/bits/shm.h: Likewise.
Patch by Hareesh Nagarajan <hareesh.nagarajan@gmail.com>.