initscripts: do not show text on console when booting

Change-Id: I1ad370b496dc11eb3fe79b6715af1947252a2136
Reviewed-by: Samuli Piippo <samuli.piippo@digia.com>

recipes/initscripts/initscripts_1.0.bbappend

+do_configure_append() {
+	sed -i -e "/echo/d" ${WORKDIR}/banner.sh
+}