nptl: use arch-specific pthread_cond_timedwait and pthread_cond_wait on x86_64

Generic ones were broken on x86_64, pthread/ex2 test failed while pthread/ex5
worked fine. So use arch-specific functions and fix linkage failure with
__pthread_mutex_cond_lock_adjust.

Signed-off-by: Roman I Khimov <khimov@altell.ru>
Signed-off-by: Austin Foxley <austinf@cetoncorp.com>

libpthread/nptl/pthread_mutex_lock.c

@@ -477,7 +477,7 @@ strong_alias (__pthread_mutex_lock, __pthread_mutex_lock_internal)
 
 
 #ifdef NO_INCR
-void
+void attribute_protected
 __pthread_mutex_cond_lock_adjust (
      pthread_mutex_t *mutex)
 {

libpthread/nptl/sysdeps/unix/sysv/linux/x86_64/Makefile.arch

@@ -18,8 +18,7 @@ libpthread_SSRC += lowlevellock.S pthread_barrier_wait.S pthread_cond_signal.S p
 		   sem_post.S sem_timedwait.S lowlevelrobustlock.S \
 		   sem_trywait.S sem_wait.S pthread_rwlock_rdlock.S pthread_rwlock_wrlock.S \
 		   pthread_rwlock_timedrdlock.S pthread_rwlock_timedwrlock.S pthread_rwlock_unlock.S \
-		   pthread_spin_unlock.S cancellation.S
-# pthread_cond_timedwait.S pthread_cond_wait.S
+		   pthread_spin_unlock.S cancellation.S pthread_cond_timedwait.S pthread_cond_wait.S
 libc_a_SSRC += libc-lowlevellock.S
 librt_a_SSRC += librt-lowlevellock.S
 
@@ -39,6 +38,8 @@ ASFLAGS-cancellation.S = -DNOT_IN_libc=1 -DIS_IN_libpthread=1 -D_LIBC_REENTRANT
 
 ASFLAGS-clone.S = -D_LIBC_REENTRANT
 ASFLAGS-vfork.S = -D_LIBC_REENTRANT
+ASFLAGS-pthread_cond_timedwait.S = -D_LIBC_REENTRANT
+ASFLAGS-pthread_cond_wait.S = -D_LIBC_REENTRANT
 ASFLAGS-libc-lowlevellock.S = -D_LIBC_REENTRANT
 ASFLAGS-libc-cancellation.S = -D_LIBC_REENTRANT