beaglebone: start qtlauncher only after /dev/fb0 exists

Beaglebone creates /dev/fb0 late in the boot process, which causes
Qt applications to crash if started too early. Make systemd notice
fb0 creation and bind application startup to it.

Change-Id: I0207fb64ec981eaeadbe497de5a9bdc941b6e31d
Reviewed-by: Risto Avila <risto.avila@qt.io>
Reviewed-by: Teemu Holappa <teemu.holappa@theqtcompany.com>

meta-ti-extras/recipes/libgles/ti-sgx-ddk-um/99-fb.rules

+KERNEL=="fb0", TAG+="systemd"

meta-ti-extras/recipes/libgles/ti-sgx-ddk-um_%.bbappend

+############################################################################
+##
+## Copyright (C) 2016 The Qt Company Ltd.
+## Contact: https://www.qt.io/licensing/
+##
+## This file is part of the Boot to Qt meta layer.
+##
+## $QT_BEGIN_LICENSE:GPL$
+## Commercial License Usage
+## Licensees holding valid commercial Qt licenses may use this file in
+## accordance with the commercial license agreement provided with the
+## Software or, alternatively, in accordance with the terms contained in
+## a written agreement between you and The Qt Company. For licensing terms
+## and conditions see https://www.qt.io/terms-conditions. For further
+## information use the contact form at https://www.qt.io/contact-us.
+##
+## GNU General Public License Usage
+## Alternatively, this file may be used under the terms of the GNU
+## General Public License version 3 or (at your option) any later version
+## approved by the KDE Free Qt Foundation. The licenses are as published by
+## the Free Software Foundation and appearing in the file LICENSE.GPL3
+## included in the packaging of this file. Please review the following
+## information to ensure the GNU General Public License requirements will
+## be met: https://www.gnu.org/licenses/gpl-3.0.html.
+##
+## $QT_END_LICENSE$
+##
+############################################################################
+
+FILESEXTRAPATHS_append := "${THISDIR}/${PN}:"
+SRC_URI += "file://99-fb.rules"
+
+do_install_append() {
+    install -d ${D}${base_libdir}/udev/rules.d
+    install -m 0644 ${WORKDIR}/99-fb.rules ${D}${base_libdir}/udev/rules.d
+}
+
+FILES_${PN} += "${base_libdir}/udev/rules.d/*.rules"

recipes-qt/b2qt-addons/b2qt-launcher/beaglebone/b2qt.service

+[Unit]
+Description=B2Qt user application
+BindsTo=dev-fb0.device
+After=dev-fb0.device
+ConditionPathExists=/usr/bin/b2qt
+
+[Service]
+ExecStart=-/usr/bin/appcontroller /usr/bin/b2qt
+
+[Install]
+WantedBy=multi-user.target

recipes-qt/b2qt-addons/b2qt-launcher/beaglebone/qtlauncher.service

+[Unit]
+Description=B2Qt Launcher Demo
+BindsTo=dev-fb0.device
+After=dev-fb0.device
+ConditionPathExists=!/usr/bin/b2qt
+
+[Service]
+ExecStart=-/usr/bin/appcontroller /usr/bin/qtlauncher --applications-root /data/user/qt
+
+[Install]
+WantedBy=multi-user.target