Merge remote-tracking branch 'sm8350/lineage-20' into lineage-21

* sm8350/lineage-20:
  UPSTREAM: af_unix: Fix garbage collector racing against connect()
  UPSTREAM: af_unix: Do not use atomic ops for unix_sk(sk)->inflight.
  .gitignore: Don't ignore generated defconfigs
  Fix build issue that compiler options treat warnning as a error

Change-Id: Ie39ece3420a389e50abd972e09957522087b9f1f