[hitori] WIP work to check gtk-builder files

[Philip Withnall <pwithnall src gnome org>]

commit 7deab83d921149fab38fbc3fd59852dd16f079f2
Author: Philip Withnall <philip tecnocode co uk>
Date:   Mon Dec 5 18:17:55 2016 +0000

    WIP work to check gtk-builder files

 Makefile.am |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/Makefile.am b/Makefile.am
index 67e7e6e..f82554d 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -89,6 +89,10 @@ dist_noinst_DATA = \
        data/hitori.ui \
        data/hitori.css
 
+check-builder: $(ui_DATA)
+       xmllint --nonet --noblanks --noout --relaxng /opt/gnome3/source/gtk+/gtk/gtkbuilder.rng $^
+check-local: check-builder
+
 # GSettings
 gsettings_SCHEMAS = data/org.gnome.hitori.gschema.xml
 @GSETTINGS_RULES@