Roll external/abseil_cpp/ dee6c6283..8836ff0ba (3 commits) (KhronosGroup#6563)

abseil/abseil-cpp@dee6c62...8836ff0

Created with:
  roll-dep external/abseil_cpp

Co-authored-by: GitHub Actions[bot] <>

Author: github-actions[bot]

DEPS

@@ -3,7 +3,7 @@ use_relative_paths = True
 vars = {
   'github': 'https://github.com',
 
-  'abseil_revision': 'dee6c628372aca2474dcda526e69f46798dd348a',
+  'abseil_revision': '3b777f67987ddab66127c7004923d6eb7576d898',
 
   'effcee_revision': 'ae38e040cbb7e83efa8bfbb4967e5b8c8c89b55a',