openpower/witherspoon: add a monospace-only liberation font package

For text-to-video rendering, we need a font. This change adds a small
overlay to the existing liberation fonts package, to only use the
monospace font.

Change-Id: I7e0bc307dceb95732f94616d9249df34b484b629
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
diff --git a/meta-witherspoon/recipes-phosphor/video/liberation-fonts_2.00.1.bbappend b/meta-witherspoon/recipes-phosphor/video/liberation-fonts_2.00.1.bbappend
new file mode 100644
index 0000000..5283a78
--- /dev/null
+++ b/meta-witherspoon/recipes-phosphor/video/liberation-fonts_2.00.1.bbappend
@@ -0,0 +1,9 @@
+
+do_install () {
+	install -d ${D}${datadir}/fonts/ttf/
+	for i in LiberationMono-Regular.ttf; do
+		install -m 0644 $i ${D}${prefix}/share/fonts/ttf/${i}
+	done
+	install -d ${D}${sysconfdir}/fonts/conf.d/
+	install -m 0644 ${WORKDIR}/30-liberation-aliases.conf ${D}${sysconfdir}/fonts/conf.d/
+}