[gnome-builder] build: add markdown to build

[Christian Hergert <chergert src gnome org>]

commit 8c9ca1be5c6b9851705d2332c899008635e9ac5d
Author: Christian Hergert <christian hergert me>
Date:   Mon Dec 1 20:01:25 2014 -0800

    build: add markdown to build

 src/gnome-builder.mk |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/src/gnome-builder.mk b/src/gnome-builder.mk
index 0ba5cdc..755c462 100644
--- a/src/gnome-builder.mk
+++ b/src/gnome-builder.mk
@@ -81,6 +81,8 @@ libgnome_builder_la_SOURCES = \
        src/markdown/gs-markdown.h \
        src/markdown/gb-markdown-preview.c \
        src/markdown/gb-markdown-preview.h \
+       src/markdown/gb-markdown-tab.c \
+       src/markdown/gb-markdown-tab.h \
        src/navigation/gb-navigation-list.h \
        src/navigation/gb-navigation-list.c \
        src/navigation/gb-navigation-item.h \