Re-enable rust clippy on its own shard

Marked allow_failures because it may pick up transient breakages from nightly rust

.travis.yml

@@ -234,10 +234,6 @@ matrix:
       stage: Test Pants
       language: python
       python: "2.7.13"
-      addons:
-        apt:
-          packages:
-            - cmake
       before_install:
         - sudo apt-get install -y pkg-config fuse libfuse-dev
         - sudo modprobe fuse
@@ -271,6 +267,32 @@ matrix:
       script:
         # Platform-specific tests currently need a pants pex, so we bootstrap here (no -b) and set -z to run the platform-specific tests.
         - ./build-support/bin/ci.sh -ez
+
+  allow_failures:
+    - name: rust-clippy
+
+jobs:
+  # Rust Clippy on Linux with nightly Rust
+  - name: rust-clippy
+    os: linux
+    dist: trusty
+    sudo: required
+    stage: Test Pants
+    language: python
+    python: "2.7.13"
+    before_install:
+      - sudo apt-get install -y pkg-config fuse libfuse-dev
+      - sudo modprobe fuse
+      - sudo chmod 666 /dev/fuse
+      - sudo chown root:$USER /etc/fuse.conf
+    env:
+      - SHARD="Rust Clippy on Linux with nightly Rust"
+    before_script:
+      - ulimit -c unlimited
+      - ulimit -n 8192
+    script:
+      - ./build-support/bin/ci.sh -bs
+
 deploy:
   # See: https://docs.travis-ci.com/user/deployment/s3/
   provider: s3