[evolution-data-server] Fix configure warning about BUILT_SOURCES

[Milan Crha <mcrha src gnome org>]

commit edf69a57e6a9837b2426e23d0c1c0bd94b875a61
Author: Milan Crha <mcrha redhat com>
Date:   Wed Jun 27 14:41:22 2012 +0200

    Fix configure warning about BUILT_SOURCES

 addressbook/libebook/Makefile.am |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/addressbook/libebook/Makefile.am b/addressbook/libebook/Makefile.am
index 0205b0e..2d37f01 100644
--- a/addressbook/libebook/Makefile.am
+++ b/addressbook/libebook/Makefile.am
@@ -136,7 +136,7 @@ typelib_DATA = $(INTROSPECTION_GIRS:.gir=.typelib)
 CLEANFILES += $(dist_gir_DATA) $(typelib_DATA)
 endif
 
-BUILT_SOURCES = $(ENUM_GENERATED) $(MARSHAL_GENERATED)
+BUILT_SOURCES += $(ENUM_GENERATED) $(MARSHAL_GENERATED)
 CLEANFILES    += $(BUILT_SOURCES)
 DISTCLEANFILES = $(pkgconfig_DATA)