Roll external/abseil_cpp/ 351086314..deaf34920 (15 commits)

abseil/abseil-cpp@3510863...deaf349

Created with:
  roll-dep external/abseil_cpp

Author: GitHub Actions[bot]

DEPS

@@ -3,7 +3,7 @@ use_relative_paths = True
 vars = {
   'github': 'https://github.com',
 
-  'abseil_revision': '351086314d46e73d430296c9eca1f6d6c0372cd1',
+  'abseil_revision': 'deaf3492058687e208a3868649459b9d61e4ad7e',
 
   'effcee_revision': 'ae38e040cbb7e83efa8bfbb4967e5b8c8c89b55a',