bug#9010: sigprocmask -> pthread_sigmask for Emacs

[Eli Zaretskii <eliz@gnu.org>]

> From: Juanma Barranquero <lekktu@gmail.com>
> Date: Sat, 9 Jul 2011 01:29:28 +0200
> Cc: Eli Zaretskii <eliz@gnu.org>, 9010@debbugs.gnu.org
> 
> On Fri, Jul 8, 2011 at 22:42, Paul Eggert <eggert@cs.ucla.edu> wrote:
> 
> > OK, I installed the patch into the trunk as bzr 105047.
> > This is a bit different from the earlier patch, as both
> > Emacs and gnulib have mutated in the meantime, but I don't
> > think the differences affect w32 or msdos.
> 
> Oh, I'd say it does indeed:
> 
> oo-spd/i386/temacs1.a(process.o): In function `create_process':
> C:\emacs\trunk\src/process.c:1655: undefined reference to `pthread_sigmask'
> C:\emacs\trunk\src/process.c:1811: undefined reference to `pthread_sigmask'
> C:\emacs\trunk\src/process.c:1903: undefined reference to `pthread_sigmask'
> C:\emacs\trunk\src/process.c:1903: undefined reference to `pthread_sigmask'
> oo-spd/i386/temacs2.a(sysdep.o): In function `sys_sigblock':
> C:\emacs\repo\trunk\src/sysdep.c:1537: undefined reference to `pthread_sigmask'
> oo-spd/i386/temacs2.a(sysdep.o):C:\emacs\trunk\src/sysdep.c:1545: more
> undefined references to `pthread_sigmask' follow
> collect2: ld returned 1 exit status
> make[1]: *** [oo-spd/i386/temacs.exe] Error 1
> make[1]: Leaving directory `C:/emacs/trunk/src'
> make: *** [all-other-dirs-gmake] Error 2

Fixed.