build: update to bazel 3.4.0

Author: alan-agius4

.bazelversion

@@ -1,3 +1,3 @@
-2.1.1
+3.4.1
 # [NB: this comment has to be after the first line, see https://github.com/bazelbuild/bazelisk/issues/117]
-# When updating the Bazel version you also need to update the RBE toolchains version in package.bzl
+# When updating the Bazel version you also need to update the RBE toolchains version in WORKSPACE

.circleci/bazel.rc

@@ -14,7 +14,8 @@ test --test_tag_filters=-manual
 # Bazel doesn't calculate the memory ceiling correctly when running under Docker.
 # Limit Bazel to consuming resources that fit in CircleCI "medium" class which is the default:
 # https://circleci.com/docs/2.0/configuration-reference/#resource_class
-build --local_resources=3072,2.0,1.0
+build --local_ram_resources=3072
+build --local_cpu_resources=2
 
 # More details on failures
 build --verbose_failures=true

WORKSPACE

@@ -120,17 +120,18 @@ rbe_autoconfig(
     # Need to specify a base container digest in order to ensure that we can use the checked-in
     # platform configurations for the "ubuntu16_04" image. Otherwise the autoconfig rule would
     # need to pull the image and run it in order determine the toolchain configuration. See:
-    # https://github.com/bazelbuild/bazel-toolchains/blob/1.1.2/configs/ubuntu16_04_clang/versions.bzl
-    base_container_digest = "sha256:1ab40405810effefa0b2f45824d6d608634ccddbf06366760c341ef6fbead011",
+    # https://github.com/bazelbuild/bazel-toolchains/blob/3.4.1/configs/ubuntu16_04_clang/versions.bzl
+    base_container_digest = "sha256:b27c9c4786d5bd1c709aa979b7432328806e0ff671e2175d696584eec4fd0ec3",
     # Note that if you change the `digest`, you might also need to update the
     # `base_container_digest` to make sure marketplace.gcr.io/google/rbe-ubuntu16-04-webtest:<digest>
     # and marketplace.gcr.io/google/rbe-ubuntu16-04:<base_container_digest> have
     # the same Clang and JDK installed. Clang is needed because of the dependency on
     # @com_google_protobuf. Java is needed for the Bazel's test executor Java tool.
-    digest = "sha256:0b8fa87db4b8e5366717a7164342a029d1348d2feea7ecc4b18c780bc2507059",
+    digest = "sha256:f743114235a43355bf8324e2ba0fa6a597236fe06f7bc99aaa9ac703631c306b",
     env = clang_env(),
     registry = "marketplace.gcr.io",
     # We can't use the default "ubuntu16_04" RBE image provided by the autoconfig because we need
     # a specific Linux kernel that comes with "libx11" in order to run headless browser tests.
     repository = "google/rbe-ubuntu16-04-webtest",
+    use_checked_in_confs = "Force",
 )