[phodav] chezdav: Fix build/linker failure

[Rico Tzschichholz <ricotz src gnome org>]

commit 61e375b435e9313b5c7b26b925d09e81822f10eb
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Fri Nov 27 08:30:22 2015 +0100

    chezdav: Fix build/linker failure

 Makefile.am |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/Makefile.am b/Makefile.am
index 485417b..6127f93 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -135,6 +135,7 @@ chezdav_LDADD =                     \
        libphodav-2.0.la        \
        $(GLIB_LIBS)            \
        $(GIO_LIBS)             \
+       $(SOUP_LIBS)            \
        $(AVAHI_LIBS)           \
        $(NULL)