util: use qemu_create() in qemu_write_pidfile()

qemu_open_old(O_CREATE) should be replaced with qemu_create() which
handles Error reporting.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20220420132624.2439741-38-marcandre.lureau@redhat.com>

util/oslib-posix.c

@@ -138,9 +138,8 @@ bool qemu_write_pidfile(const char *path, Error **errp)
             .l_len = 0,
         };
 
-        fd = qemu_open_old(path, O_CREAT | O_WRONLY, S_IRUSR | S_IWUSR);
+        fd = qemu_create(path, O_WRONLY, S_IRUSR | S_IWUSR, errp);
         if (fd == -1) {
-            error_setg_errno(errp, errno, "Cannot open pid file");
             return false;
         }