6556 64-bit SPARC libc needs signalfd.o too

@@ -17,10 +17,11 @@
 # information: Portions Copyright [yyyy] [name of copyright owner]
 #
 # CDDL HEADER END
 #
 #
+# Copyright 2016 Gary Mills
 # Copyright (c) 1989, 2010, Oracle and/or its affiliates. All rights reserved.
 # Copyright (c) 2015, Joyent, Inc.  All rights reserved.
 # Copyright (c) 2013, OmniTI Computer Consulting, Inc. All rights reserved.
 # Copyright 2013 Garrett D'Amore <garrett@damore.org>
 #

@@ -919,10 +920,11 @@
         sharefs.o               \
         shmsys.o                \
         sidsys.o                \
         siginterrupt.o          \
         signal.o                \
+        signalfd.o              \
         sigpending.o            \
         sigstack.o              \
         stat.o                  \
         symlink.o               \
         tasksys.o               \