Update com_github_gflags_gflags digest to 58cf1ef

Author: mend-for-github.amrom.workers.dev[bot]

WORKSPACE

@@ -37,11 +37,11 @@ load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
 # External dependency: Google Flags; has Bazel build already.
 http_archive(
     name = "com_github_gflags_gflags",
-    sha256 = "6e16c8bc91b1310a44f3965e616383dbda48f83e8c1eaa2370a215057b00cabe",
-    strip_prefix = "gflags-77592648e3f3be87d6c7123eb81cbad75f9aef5a",
+    sha256 = "5aaa6b18eb4f7cdb24c920f6f52f264524c07c682b8f139a9db6608876621816",
+    strip_prefix = "gflags-58cf1ef6d038e007c6b96aeda453503b59ffef8f",
     urls = [
-        "https://mirror.bazel.build/github.com/gflags/gflags/archive/77592648e3f3be87d6c7123eb81cbad75f9aef5a.tar.gz",
-        "https://github.com/gflags/gflags/archive/77592648e3f3be87d6c7123eb81cbad75f9aef5a.tar.gz",
+        "https://mirror.bazel.build/github.com/gflags/gflags/archive/58cf1ef6d038e007c6b96aeda453503b59ffef8f.tar.gz",
+        "https://github.com/gflags/gflags/archive/58cf1ef6d038e007c6b96aeda453503b59ffef8f.tar.gz",
     ],
 )