[Patch][BZ 14583] Fix prototype of sigsetjmp in pthread.h

[Roland McGrath]

The declaration is necessary there because the pthread_cleanup_push macro
uses the function.  <pthread.h> is not allowed to include <setjmp.h>, hence
the duplication.  You should make the prototype match exactly, i.e. [1] vs *.
It might be nice to avoid the duplication by having a common bits/ header
that holds that declaration.  But it seems like overkill for the single
declaration (which is really all pthread.h needs).


Thanks,
Roland