Merge commit '60e0fc8f94210cc42fa35fcfd552851cdb6038cc' as 'third_party/abseil'

From https://github.com/abseil/abseil-cpp

Change-Id: Ie825436b781856590d9bd4a0c91ac4f41b9bef62
diff --git a/WORKSPACE b/WORKSPACE
index fec0475..eded67f 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -96,6 +96,22 @@
     url = "http://www.frc971.org/Build-Dependencies/clang_3p6.tar.gz",
 )
 
+local_repository(
+    name = "com_google_absl",
+    path = "third_party/abseil",
+)
+
+# C++ rules for Bazel.
+http_archive(
+    name = "rules_cc",
+    sha256 = "67412176974bfce3f4cf8bdaff39784a72ed709fc58def599d1f68710b58d68b",
+    strip_prefix = "rules_cc-b7fe9697c0c76ab2fd431a891dbb9a6a32ed7c3e",
+    urls = [
+        "https://mirror.bazel.build/github.com/bazelbuild/rules_cc/archive/b7fe9697c0c76ab2fd431a891dbb9a6a32ed7c3e.zip",
+        "https://github.com/bazelbuild/rules_cc/archive/b7fe9697c0c76ab2fd431a891dbb9a6a32ed7c3e.zip",
+    ],
+)
+
 new_local_repository(
     name = "usr_repo",
     build_file = "@//debian:usr.BUILD",