Initial support for mozilla flame (#356)

* Initial Mozilla Flame packages

* Update dtbtool to use LineageOS upstream

* Use mkbootimg --dt flag only when deviceinfo_bootimg_qcdt is defined

* Update mkbootimg to use LineageOS upstream

* Add sparse image flashing on device-mozilla-flame

* Only support SD card install on Mozilla Flame

* Remove useless profile.sh on mozilla flame

* Package DTBs in /usr/lib/linux-mozilla-flame/

* Build and install modules in linux-mozilla-flame