* sysdeps/unix/sysv/linux/alpha/sendfile64.c: New.
* sysdeps/unix/sysv/linux/ia64/sendfile64.c: New.
* sysdeps/unix/sysv/linux/sparc/sparc64/sendfile64.c: New.
* sysdeps/unix/sysv/linux/x86_64/sendfile64.c: New.
* sysdeps/unix/sysv/linux/syscalls.list (sendfile): Remove EXTRA.
(sendfile64): Likewise.
* sysdeps/unix/sysv/linux/alpha/syscalls.list (sendfile): Likewise.
* sysdeps/unix/sysv/linux/ia64/syscalls.list (sendfile): Likewise.
* sysdeps/unix/sysv/linux/sparc/sparc64/syscalls.list (sendfile):
Likewise.
* sysdeps/unix/sysv/linux/x86_64/syscalls.list (sendfile): Likewise.