monotone-1.1nb3 "mtn ls unk" dies on OS X 10.9

[Masao Uebayashi <uebayasi%gmail.com@localhost>]

monotone-1.1nb3 on Mac OS X 10.9 dies when I call "mtn ls unk".  According
to lldb _fstatat symbol resolution is failing.  I tried this hack and confirmed
"mtn ls unk" worked.  (I don't know why configure mistakenly detected it.)

Can anyone look after this?  Thanks!

Index: Makefile
===================================================================
RCS file: /cvsroot/pkgsrc/devel/monotone/Makefile,v
retrieving revision 1.93
diff -u -r1.93 Makefile
--- Makefile	19 Oct 2014 22:27:45 -0000	1.93
+++ Makefile	8 Nov 2014 12:01:01 -0000
@@ -47,6 +47,9 @@
 CONFIGURE_ARGS+=	--disable-ipv6
 .endif
 
+# XXX Darwin
+CONFIGURE_ARGS+=	ac_cv_func_fstatat=no
+
 INSTALLATION_DIRS+=	share/monotone
 
 BUILDLINK_API_DEPENDS.pcre+=	pcre>=7.6