Update abseil-cpp to the latest

bazel/grpc_deps.bzl

@@ -165,9 +165,9 @@ def grpc_deps():
     if "com_google_absl" not in native.existing_rules():
         http_archive(
             name = "com_google_absl",
-            sha256 = "c5f6429c067e6b8f3c6d13d1ab2bdcd559c6f8b85317aa5b0dc8c364c37d1742",
-            strip_prefix = "abseil-cpp-846e5dbedac123d12455adcfe6f53c8b5dcbfeef",
-            url = "https://github.com/abseil/abseil-cpp/archive/846e5dbedac123d12455adcfe6f53c8b5dcbfeef.tar.gz",
+            sha256 = "ce318a8cd0fa4443c6c01d385cd28b2785b8160dd270b945d6b08cccff568ce6",
+            strip_prefix = "abseil-cpp-0514227d2547793b23e209809276375e41c76617",
+            url = "https://github.com/abseil/abseil-cpp/archive/0514227d2547793b23e209809276375e41c76617.tar.gz",
         )
 
     if "bazel_toolchains" not in native.existing_rules():

third_party/abseil-cpp

@@ -1 +1 @@
-Subproject commit 846e5dbedac123d12455adcfe6f53c8b5dcbfeef
+Subproject commit 0514227d2547793b23e209809276375e41c76617

tools/run_tests/sanity/check_submodules.sh

@@ -26,7 +26,7 @@ want_submodules=$(mktemp /tmp/submXXXXXX)
 
 git submodule | awk '{ print $1 }' | sort > "$submodules"
 cat << EOF | awk '{ print $1 }' | sort > "$want_submodules"
- 846e5dbedac123d12455adcfe6f53c8b5dcbfeef third_party/abseil-cpp (heads/master)
+ 0514227d2547793b23e209809276375e41c76617 third_party/abseil-cpp (heads/master)
  090faecb454fbd6e6e17a75ef8146acb037118d4 third_party/benchmark (v1.5.0)
  73594cde8c9a52a102c4341c244c833aa61b9c06 third_party/bloaty (remotes/origin/wide-14-g73594cd)
  7f02881e96e51f1873afcf384d02f782b48967ca third_party/boringssl (remotes/origin/HEAD)