[PATCH] hppa: Use generic pthread conditional variable support

[Torvald Riegel]

On Sun, 2017-03-12 at 10:58 -0400, John David Anglin wrote:
> The attach change switches the hppa target to use the generic pthread conditional variable support.
> We lose compatibility with linuxthreads but I don't think that is relevant anymore for the existing distributions.
> 
> The change fixes bug nptl/21016.
> 
> Okay?

Carlos was thinking about re-arranging the struct layout and reserving
the LSB of __g1_orig_size for the bit that would be set in a condvar
initialized by linuxthreads:
https://sourceware.org/ml/libc-alpha/2017-03/msg00058.html