Implement new NPTL POSIX Threads ABI for HPPA.

Implement new NPTL POSIX Threads ABI for HPPA.

This version of the NPTL POSIX thread ABI for hppa does
not break backwards compatibility with the the old
Linuxthreads ABI, and is therefore suitable for release
by distributions.

	sysdeps/unix/sysv/linux/hppa/
	* internaltypes.h: New file.

	sysdeps/unix/sysv/linux/hppa/nptl/
	* pthreadP.h: New file.
	* pthread.h: New file.
	* pthread_cond_broadcast.c: New file.
	* pthread_cond_destroy.c: New file.
	* pthread_cond_init.c: New file.
	* pthread_cond_signal.c: New file.
	* pthread_cond_timedwait.c: New file.
	* pthread_cond_wait.c: New file.
	* bits/pthreadtypes.h: Make pthread_mutex_t,
	pthread_rwlock_t, and pthread_cond_t backwards
	compatible.