[folks] build: Add folks-internal.la to $(backend_libadd)

[Philip Withnall <pwithnall src gnome org>]

commit d052041a4dd444648a708da5ecdc41f9cbbc68a4
Author: Philip Withnall <philip withnall collabora co uk>
Date:   Wed Nov 6 10:14:39 2013 +0000

    build: Add folks-internal.la to $(backend_libadd)

 backends/backend.mk |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/backends/backend.mk b/backends/backend.mk
index 32a7590..16f14f9 100644
--- a/backends/backend.mk
+++ b/backends/backend.mk
@@ -65,6 +65,7 @@ backend_cflags = \
 backend_libadd = \
        $(AM_LIBADD) \
        $(top_builddir)/folks/libfolks.la \
+       $(top_builddir)/folks/libfolks-internal.la \
        $(GIO_LIBS) \
        $(GLIB_LIBS) \
        $(GEE_LIBS) \