merge(3p/absl): subtree merge of Abseil up to e19260f

... notably, this includes Abseil's own StatusOr type, which
conflicted with our implementation (that was taken from TensorFlow).

Change-Id: Ie7d6764b64055caaeb8dc7b6b9d066291e6b538f

third_party/abseil_cpp/absl/time/BUILD.bazel

@@ -24,7 +24,7 @@ load(
 
 package(default_visibility = ["//visibility:public"])
 
-licenses(["notice"])  # Apache 2.0
+licenses(["notice"])
 
 cc_library(
     name = "time",
@@ -70,6 +70,7 @@ cc_library(
     ],
     deps = [
         ":time",
+        "//absl/base:config",
         "//absl/base:raw_logging_internal",
         "//absl/time/internal/cctz:time_zone",
         "@com_google_googletest//:gtest",