[gnome-boxes] build: Add new org.gnome.Boxes.service.in to EXTRA_DIST

[Felipe Borges <felipeborges src gnome org>]

commit 0b6fc4a9d158f22ed5c3e7834e4666ac5aa2de01
Author: Felipe Borges <felipeborges gnome org>
Date:   Mon Jul 17 11:03:31 2017 +0200

    build: Add new org.gnome.Boxes.service.in to EXTRA_DIST
    
    This was preventing make distcheck to function properly.

 data/Makefile.am |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/data/Makefile.am b/data/Makefile.am
index 62593cb..2cd5ab2 100644
--- a/data/Makefile.am
+++ b/data/Makefile.am
@@ -51,6 +51,7 @@ EXTRA_DIST =                                  \
        org.gnome.Boxes.desktop.in              \
        gnome-boxes-search-provider.ini.in      \
        org.gnome.boxes.gschema.xml.in          \
+       org.gnome.Boxes.service.in      \
        $(gresource_file)                       \
        $(resource_files)                       \
        $(desktop_in_files)                     \