Add new toolchain/platform flags to sample bazelrcs. (#82)

diff --git a/bazelrc/bazel-0.14.1.bazelrc b/bazelrc/bazel-0.14.1.bazelrc
index a34be04..eeb2e35 100644
--- a/bazelrc/bazel-0.14.1.bazelrc
+++ b/bazelrc/bazel-0.14.1.bazelrc
@@ -34,6 +34,9 @@
 build:remote --javabase=@bazel_toolchains//configs/ubuntu16_04_clang/1.0:jdk8
 build:remote --crosstool_top=@bazel_toolchains//configs/ubuntu16_04_clang/1.0/bazel_0.14.1/default:toolchain
 build:remote --experimental_remote_platform_override='properties:{ name:"container-image" value:"docker://gcr.io/cloud-marketplace/google/rbe-ubuntu16-04@sha256:59bf0e191a6b5cc1ab62c2224c810681d1326bad5a27b1d36c9f40113e79da7f" }'
+build:remote --action_env=BAZEL_DO_NOT_DETECT_CPP_TOOLCHAIN=1
+build:remote --extra_toolchains=@bazel_toolchains//configs/ubuntu16_04_clang/1.0/bazel_0.14.1/cpp:cc-toolchain-clang-x86_64-default
+build:remote --extra_execution_platforms=@bazel_toolchains//configs/ubuntu16_04_clang/1.0:rbe_ubuntu1604
 
 # Set various strategies so that all actions execute remotely. Mixing remote
 # and local execution will lead to errors unless the toolchain and remote
diff --git a/configs/debian8_clang/0.3.0/toolchain.bazelrc b/configs/debian8_clang/0.3.0/toolchain.bazelrc
index 7da432f..9945609 100644
--- a/configs/debian8_clang/0.3.0/toolchain.bazelrc
+++ b/configs/debian8_clang/0.3.0/toolchain.bazelrc
@@ -3,6 +3,9 @@
 build:remote --javabase=@bazel_toolchains//configs/debian8_clang/0.3.0:jdk8
 build:remote --crosstool_top=@bazel_toolchains//configs/debian8_clang/0.3.0/bazel_0.14.1/default:toolchain
 build:remote --experimental_remote_platform_override='properties:{ name:"container-image" value:"docker://gcr.io/cloud-marketplace/google/rbe-debian8@sha256:0d5db936f8fa04638ca31e4fc117415068dca43dc343d605c0db2a15f433a327" }'
+build:remote --action_env=BAZEL_DO_NOT_DETECT_CPP_TOOLCHAIN=1
+build:remote --extra_toolchains=@bazel_toolchains//configs/debian8_clang/0.3.0/bazel_0.14.1/cpp:cc-toolchain-clang-x86_64-default
+build:remote --extra_execution_platforms=@bazel_toolchains//configs/debian8_clang/0.3.0:rbe_debian8
 
 # Experimental configs for sanitizers, use --config=remote,remote-xxsan,remote-<asan/tsan/msan> (in that order)
 build:remote-xxsan --copt=-gmlt
diff --git a/configs/ubuntu16_04_clang/1.0/toolchain.bazelrc b/configs/ubuntu16_04_clang/1.0/toolchain.bazelrc
index 9eccec4..f15017e 100644
--- a/configs/ubuntu16_04_clang/1.0/toolchain.bazelrc
+++ b/configs/ubuntu16_04_clang/1.0/toolchain.bazelrc
@@ -3,6 +3,9 @@
 build:remote --javabase=@bazel_toolchains//configs/ubuntu16_04_clang/1.0:jdk8
 build:remote --crosstool_top=@bazel_toolchains//configs/ubuntu16_04_clang/1.0/bazel_0.14.1/default:toolchain
 build:remote --experimental_remote_platform_override='properties:{ name:"container-image" value:"docker://gcr.io/cloud-marketplace/google/rbe-ubuntu16-04@sha256:59bf0e191a6b5cc1ab62c2224c810681d1326bad5a27b1d36c9f40113e79da7f" }'
+build:remote --action_env=BAZEL_DO_NOT_DETECT_CPP_TOOLCHAIN=1
+build:remote --extra_toolchains=@bazel_toolchains//configs/ubuntu16_04_clang/1.0/bazel_0.14.1/cpp:cc-toolchain-clang-x86_64-default
+build:remote --extra_execution_platforms=@bazel_toolchains//configs/ubuntu16_04_clang/1.0:rbe_ubuntu1604
 
 # Experimental configs for sanitizers, use --config=remote,remote-xxsan,remote-<asan/tsan/msan> (in that order)
 build:remote-xxsan --copt=-gmlt