Roll external/abseil_cpp/ 4eb1e49cf..7b61c35cd (40 commits)

abseil/abseil-cpp@4eb1e49...7b61c35

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': '4eb1e49cf32ac70dd1d393812ecbcad1d90af68e',
+  'abseil_revision': '7b61c35cde6a2e495c157f7202166d24291d2bb5',
 
   'effcee_revision': 'abcaf70f288ae9f7816b72b2a36fe4add4719a48',