Container release for Clang r346485 (#251)

* New container release: clang r346485

* Also update the clang baze images that are now available on google marketplace
diff --git a/rules/toolchain_containers.bzl b/rules/toolchain_containers.bzl
index 439baa2..b177e99 100644
--- a/rules/toolchain_containers.bzl
+++ b/rules/toolchain_containers.bzl
@@ -16,13 +16,13 @@
         # latest *debian8* based python3 image. Newer ones are ubuntu16_04 based.
         "debian8_python3": "sha256:ace668f0f01e5e562ad09c3f128488ec33fa9126313f16505a86ae77865d1696",
         # gcr.io/google-appengine/python:latest
-        "ubuntu16_04_python3": "sha256:f6955b2492f3ea481a50a9a9f0995b5f84a02d8dab357d2c9dae6b366988f074",
+        "ubuntu16_04_python3": "sha256:1bbed7b5511bb582a2a8adf6a111defce8d184987c20d6281ce2bacaf2d4f71d",
 
         ###########################################################
         # Clang images                                            #
         ###########################################################
         # gcr.io/cloud-marketplace/google/clang-debian8
-        "debian8_clang": "sha256:0946899544c00537b2af06790e72ba86aa39b16e0e05aef8f53ed79d1f89f2a0",
+        "debian8_clang": "sha256:e076c87e670f9a3c95e250268f160397d1cee482ec195d51e40b992b34198395",
         # gcr.io/cloud-marketplace/google/clang-ubuntu
-        "ubuntu16_04_clang": "sha256:79a24c15949bd5770acac41b444c5c0b7f9723dcbc708c67d87ecf71e32c9126",
+        "ubuntu16_04_clang": "sha256:9fe84f7c726419ab77a9680887ec4a518d1910a28284c2955620258db01c7aae",
     }
diff --git a/third_party/clang/revision.bzl b/third_party/clang/revision.bzl
index cf172b7..9e6d10f 100644
--- a/third_party/clang/revision.bzl
+++ b/third_party/clang/revision.bzl
@@ -1,5 +1,5 @@
-CLANG_REVISION = "r342117"
+CLANG_REVISION = "r346485"
 
-DEBIAN8_CLANG_SHA256 = "96ae880a99c7dd3a20b5eaa202cb713e8cb9820a8e99b06aed6b1f5024a884d9"
+DEBIAN8_CLANG_SHA256 = "cb23df8c63c40628bdb53de8dc3fdaaefd1ee5cdf36857f945a2ea0ec48def92"
 
-UBUNTU16_04_CLANG_SHA256 = "ee84daf8acffc4a702205a378e8dbdd0e580c58b53ef1381bb35694cae935963"
+UBUNTU16_04_CLANG_SHA256 = "46953316d672669a22a5bca7ccec39b242687bf6bcac3db1d042731de2260844"
diff --git a/third_party/golang/revision.bzl b/third_party/golang/revision.bzl
index 7dfd393..e18e823 100644
--- a/third_party/golang/revision.bzl
+++ b/third_party/golang/revision.bzl
@@ -1,2 +1,2 @@
-GOLANG_REVISION = "1.11.1"
-GOLANG_SHA256 = "2871270d8ff0c8c69f161aaae42f9f28739855ff5c5204752a8d92a1c9f63993"
+GOLANG_REVISION = "1.11.2"
+GOLANG_SHA256 = "1dfe664fa3d8ad714bbd15a36627992effd150ddabd7523931f077b3926d736d"
diff --git a/third_party/libcxx/revision.bzl b/third_party/libcxx/revision.bzl
index be5c256..796901d 100644
--- a/third_party/libcxx/revision.bzl
+++ b/third_party/libcxx/revision.bzl
@@ -1,5 +1,5 @@
-LIBCXX_REVISION = "r342117"
+LIBCXX_REVISION = "r346485"
 
-DEBIAN8_LIBCXX_SHA256 = "1f28a992888e1da7a369e1e231ea31efa096954ed2b02065d73fb14e5982b922"
+DEBIAN8_LIBCXX_SHA256 = "ec93d2c85fc5a3bcd9d6d86461e7fb9c51d9296dde3e3e29b53ba50e7f758a66"
 
-UBUNTU16_04_LIBCXX_SHA256 = "3c814866724768a4e331f75dd015e4dcc9ae894dc4a320b7f332d5238e41e956"
+UBUNTU16_04_LIBCXX_SHA256 = "9f494d7aa9ebb7416e585fd0172b3c0af2b56e72346fb120611f3c7497cddd58"