variant fixes

* get rid of variant.sh
* utilize INIT_VENDOR_LIB for our variant props
* do blobs in the updater-script

Change-Id: I156c527b28d7805cd45676eef59f3235b5186bbb
jflte: add jfltezm

Change-Id: I68032b04b23545cc6d8d3df786351c64d3693d86
update README

Change-Id: I4e34060b4807c3b7b47303db6d8b831f3077bf93
add android_device_qcom_common to dependencies

Change-Id: If3ca864f1c6092cf354fdacd2e229f3c434cd4aa
Fix USB Tethering

Signed-off-by: aways <aways@c-rom.org>

Change-Id: I36c862548875ecb83606871a3ebc75ab89474af0