[gnome-builder] build: add missing file to EXTRA_DIST

[Christian Hergert <chergert src gnome org>]

commit 4a55b2f8f767ee9e399db1a7906a3e085295519b
Author: Christian Hergert <chergert redhat com>
Date:   Wed Dec 21 16:25:59 2016 -0800

    build: add missing file to EXTRA_DIST

 tests/Makefile.am |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/tests/Makefile.am b/tests/Makefile.am
index bfe716f..34b9d78 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -283,6 +283,7 @@ EXTRA_DIST += \
        data/project1/autogen.sh \
        data/project1/build-aux/m4/.keep \
        data/project1/configure.ac \
+       data/project1/project1.c \
        data/project1/project1.doap \
        data/project1/tags \
        data/project2/.you-dont-git-me \