Update.

Update.

	* Makefile (libpthread-routines): Remove lowlevelrwlock.  Add
	pthread_rwlock_rdlock, pthread_rwlock_timedrdlock,
	pthread_rwlock_wrlock, pthread_rwlock_timedwrlock, and
	pthread_rwlock_unlock.
	* sysdeps/unix/sysv/linux/i386/i486/lowlevelrwlock.S: Removed
	* sysdeps/unix/sysv/linux/i386/i586/lowlevelrwlock.S: Removed
	* sysdeps/unix/sysv/linux/i386/i686/lowlevelrwlock.S: Removed
	* sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_rdlock.S: New file.
	* sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_timedrdlock.S:
	New file.
	* sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_wrlock.S: New file.
	* sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_timedwrlock.S:
	New file.
	* sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_unlock.S: New file.
	* sysdeps/unix/sysv/linux/i386/i586/pthread_rwlock_rdlock.S: New file.
	* sysdeps/unix/sysv/linux/i386/i586/pthread_rwlock_timedrdlock.S:
	New file.
	* sysdeps/unix/sysv/linux/i386/i586/pthread_rwlock_wrlock.S: New file.
	* sysdeps/unix/sysv/linux/i386/i586/pthread_rwlock_timedwrlock.S:
	New file.
	* sysdeps/unix/sysv/linux/i386/i586/pthread_rwlock_unlock.S: New file.
	* sysdeps/unix/sysv/linux/i386/i686/pthread_rwlock_rdlock.S: New file.
	* sysdeps/unix/sysv/linux/i386/i686/pthread_rwlock_timedrdlock.S:
	New file.
	* sysdeps/unix/sysv/linux/i386/i686/pthread_rwlock_wrlock.S: New file.
	* sysdeps/unix/sysv/linux/i386/i686/pthread_rwlock_timedwrlock.S:
	New file.
	* sysdeps/unix/sysv/linux/i386/i686/pthread_rwlock_unlock.S: New file.