Add correct aligment to pthread_*_t structures.

Add correct aligment to pthread_*_t structures.

In the switch to NPTL the pthrad_mutex_t, pthread_cond_t,
and pthread_rwlock_t structures were made binary compatible
with the Linuxthread versions. However, their aligment when
embedded in other structures was changed. When rebuilding
libstdc++ this was detected, and the following changes return
the structures to their original Linuxthreads alignments.

2009-11-25  Carlos O'Donell  <carlos@codesourcery.com>

	* sysdeps/unix/sysv/linux/hppa/nptl/bits/pthreadtypes.h:
	Use correct alignment for pthread_mutex_t, pthread_cond_t,
	and pthread_rwlock_t.