message: Downgrade absl version.
  The current version is causing ASAN build failures in some environments.
  See
diff: @@ -5,7 +5,8 @@ REPOSITORY_LOCATIONS = dict(
  remote = "https://github.com/google/boringssl",
  ),
  com_google_absl = dict(
  - commit = "bd5a2bba8f4238db2e06c99ac808fc8327dec2a0", # 2018-05-07
  + # Do not upgrade further until https://github.com/abseil/abseil-cpp/issues/118 is fixed.
  + commit = "26b789f9a53d086c8b8c9c2668efb251e37861cd", # 2018-05-04
  remote = "https://github.com/abseil/abseil-cpp",
  ),
  com_github_bombela_backward = dict(
  