jflte: make tree universal.

* do what hammerhead did.
* shove cdma and gsm into one universal tree
* add variant script based on attn1's gsm script
* move loki down from msm8960-common so other devices can use
  TARGET_RELEASETOOLS_EXTENSIONS and not ship loki also

Change-Id: I4f2063ad5296297a945976ca011823c2a0487129
Liquify