Add METADATA to msm8996: GPL=RESTRICTED am: cc08ad0888 am: 55eb52e84c am: 8bcee4db7d

Original change: https://android-review.googlesource.com/c/platform/hardware/qcom/msm8996/+/1300194

Change-Id: I8f3594151f04cbeb1be3638814d2349927d6f032
tree: eab6e2ec0efc501bdfafbd858176a8222503f7e0
  1. kernel-headers/
  2. original-kernel-headers/
  3. METADATA
  4. msm8996.mk