Merge branch 'stable-3.0'

* stable-3.0:
  Remove bazel-genfiles from .gitignore
  Replace bazel-genfiles with bazel-bin in documentation
  Upgrade JGit to 5.3.5.201909031855-r
  Upgrade bazlets to latest stable-3.0 to build with 3.0.3 API
  Bump bazel version to 1.0.0
  Add information about LFS config to PolyGerrit UI
  Upgrade JGit to 5.1.11.201909031202-r
  Upgrade bazlets to latest stable-2.16 to build with 2.16.12 API
  Upgrade bazlets to latest stable-2.15 to build with 2.15.17 API

Change-Id: Ib7691592a8bf0eea3455e1ef4ea770e25e72f8d0