[gnome-calendar] build: add help-overlay.ui to EXTRA_DIST

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit ef0a401ccf0ff4e0568e66791d404743f1b25f77
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Tue Feb 16 20:42:39 2016 -0200

    build: add help-overlay.ui to EXTRA_DIST

 data/Makefile.am |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/data/Makefile.am b/data/Makefile.am
index 48c2837..8f24732 100644
--- a/data/Makefile.am
+++ b/data/Makefile.am
@@ -52,6 +52,7 @@ EXTRA_DIST=                     \
   ui/calendar-row.ui            \
   ui/date-selector.ui           \
   ui/edit-dialog.ui             \
+  ui/help-overlay.ui            \
   ui/menus.ui                   \
   ui/quick-add-popover.ui       \
   ui/search-view.ui             \