[folks] build: Fix LIBADD for libsocialweb backend

[Philip Withnall <pwithnall src gnome org>]

commit 6bfdae26b5311d280f2e566d05534b0ddf57603b
Author: Philip Withnall <philip withnall collabora co uk>
Date:   Tue Jan 20 10:27:36 2015 +0000

    build: Fix LIBADD for libsocialweb backend
    
    The variable was accidentally completely empty, which was causing build
    failures when compiling with -no-undefined. Fix that by populating
    LIBADD correctly.

 backends/libsocialweb/lib/Makefile.am |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/backends/libsocialweb/lib/Makefile.am b/backends/libsocialweb/lib/Makefile.am
index 9a43ee6..b224291 100644
--- a/backends/libsocialweb/lib/Makefile.am
+++ b/backends/libsocialweb/lib/Makefile.am
@@ -34,7 +34,7 @@ libfolks_libsocialweb_la_CFLAGS = \
        $(NULL)
 
 libfolks_libsocialweb_la_LIBADD = \
-       $(backend_library_LIBADD) \
+       $(backend_library_libadd) \
        $(SW_CLIENT_LIBS) \
        $(NULL)