lll_robust_mutex_cond_lock, lll_robust_mutex_timedlock,
lll_robust_mutex_unlock): New macros.
(__lll_robust_lock_wait, __lll_robust_timedlock_wait): New prototypes.
* sysdeps/alpha/tcb-offsets.sym: New file.
* sysdeps/unix/sysv/linux/alpha/sysdep-cancel.h (SINGLE_THREAD_P):
Use MULTIPLE_THREADS_OFFSET to implement !libpthread !libc version.
* sysdeps/unix/sysv/linux/alpha/lowlevellock.h: Rewrite based
on powerpc version.