[gobject-introspection] build: Add test XML file to build

[Philip Withnall <pwithnall src gnome org>]

commit 934ce4d1f44cc0f2eea81fe3bbc09037130d8fad
Author: Philip Withnall <philip withnall collabora co uk>
Date:   Mon Oct 5 10:11:02 2015 +0100

    build: Add test XML file to build
    
    Fixup to commit 10cb665fee2cc378dd2f13bad16e6384836a8b16. I failed to
    work git properly when submitting the patch.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=729660

 tests/scanner/annotationparser/Makefile.am |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/tests/scanner/annotationparser/Makefile.am b/tests/scanner/annotationparser/Makefile.am
index 37676ce..c00f109 100644
--- a/tests/scanner/annotationparser/Makefile.am
+++ b/tests/scanner/annotationparser/Makefile.am
@@ -24,6 +24,7 @@ EXTRA_DIST = \
        gi/annotation_in.xml                    \
        gi/annotation_in_out.xml                \
        gi/annotation_method.xml                \
+       gi/annotation_not_nullable.xml          \
        gi/annotation_out.xml                   \
        gi/annotation_ref_func.xml              \
        gi/annotation_rename_to.xml             \