define PTHREAD_CANCELED in pthread.h

[J. Johnston]

"Joel Sherrill " wrote:
> 
> Hi,
> 
> pthread.h didn't define PTHREAD_CANCELED which is required.
> I am surprised no one ever noticed. :>
> 
> 2002-10-07      Joel Sherrill <joel@OARcorp.com>
> 
>         * libc/include/pthread.h: Define PTHREAD_CANCELED.
> 
> 

Ok to commit.

-- Jeff J.