Update.

Update.

	* sysdeps/unix/sysv/linux/Makefile (sysdep_routines): Add
	libc_multiple_threads.
	* sysdeps/unix/sysv/linux/libc_pthread_init.c: Move definition of
	__libc_multiple_threads to...
	* sysdeps/unix/sysv/linux/libc_multiple_threads.c: ...here.  New file.

	* sysdeps/unix/sysv/linux/x86_64/sem_post.S: Remove unnecessary
	versioning.
	* sysdeps/unix/sysv/linux/x86_64/sem_trywait.S: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/sem_wait.S: Likewise.

	* sysdeps/unix/sysv/linux/x86_64/pthread_once.S
	(__pthread_once_internal): Define.

	* sysdeps/unix/sysv/linux/i386/i486/sem_post.S: Use shlib-compat.h
	macros instead of .symver directly.
	* sysdeps/unix/sysv/linux/i386/i486/sem_trywait.S: Likewise.
	* sysdeps/unix/sysv/linux/i386/i486/sem_wait.S: Likewise.