build: circleci workflows to run lint in parallel

.circleci/config.yml

@@ -1,9 +1,12 @@
+defaults: &defaults
+  working_directory: ~/ng
+  docker:
+    - image: angular/ngcontainer
+
 version: 2
 jobs:
-  build:
-    working_directory: ~/ng
-    docker:
-      - image: angular/ngcontainer
+  lint:
+    <<: *defaults
     steps:
       - checkout:
           # After checkout, rebase on top of master.
@@ -14,11 +17,30 @@ jobs:
           key: angular-{{ .Branch }}-{{ checksum "npm-shrinkwrap.json" }}
       - run: npm install
       - run: npm run postinstall
-      - run: ./node_modules/.bin/gulp lint
-      # Build twice, workaround for
-      # https://github.com/bazelbuild/bazel/issues/3114
-      - run: bazel build ... || bazel build ...
       - save_cache:
           key: angular-{{ .Branch }}-{{ checksum "npm-shrinkwrap.json" }}
           paths:
             - "node_modules"
+      - run: ./node_modules/.bin/gulp lint
+  build:
+    <<: *defaults
+    steps:
+      - checkout
+      - restore_cache:
+          key: angular-{{ .Branch }}-{{ checksum "npm-shrinkwrap.json" }}
+      - run: npm install
+      - run: npm run postinstall
+      - save_cache:
+          key: angular-{{ .Branch }}-{{ checksum "npm-shrinkwrap.json" }}
+          paths:
+            - "node_modules"
+      # Build twice, workaround for
+      # https://github.com/bazelbuild/bazel/issues/3114
+      - run: bazel build ... || bazel build ...
+
+workflows:
+  version: 2
+  default_workflow:
+    jobs:
+      - lint
+      - build