build: update gnulib for pipe on mingw

* .gnulib: Update to latest.
* bootstrap.conf (gnulib_modules): Import pipe-posix and waitpid
for mingw.
* src/remote/remote_driver.c (pipe) [WIN32]: Drop dead macro.
* daemon/event.c (pipe) [WIN32]: Drop dead function.

.gnulib @ 980f9d2c

-Subproject commit 64911207854610668b480939469282fdaeb96f74
+Subproject commit 980f9d2ceb43f9d86ea57db0367e569267c8571b

bootstrap.conf

@@ -48,6 +48,7 @@ mktempd
 netdb
 perror
 physmem
+pipe-posix
 poll
 posix-shell
 pthread
@@ -76,6 +77,7 @@ usleep
 vasprintf
 verify
 vc-list-files
+waitpid
 '
 
 # Additional xgettext options to use.  Use "\\\newline" to break lines.

daemon/event.c

@@ -621,12 +621,6 @@ static void virEventHandleWakeup(int watch ATTRIBUTE_UNUSED,
     virMutexUnlock(&eventLoop.lock);
 }
 
-#ifdef WIN32
-static inline int pipe(int fd[2]) {
-    return _pipe(fd, 4096, 0);
-}
-#endif
-
 int virEventInit(void)
 {
     if (virMutexInit(&eventLoop.lock) < 0)

src/remote/remote_driver.c

@@ -86,11 +86,6 @@
 
 #define VIR_FROM_THIS VIR_FROM_REMOTE
 
-#ifdef WIN32
-# define pipe(fds) _pipe(fds,4096, _O_BINARY)
-#endif
-
-
 static int inside_daemon = 0;
 
 struct remote_thread_call;