Update circleCI to build the tests before running them

This allows

a. caching the build status of the test deps
b. Less clutter on the test run section of the log

.circleci/config.yml

@@ -39,9 +39,13 @@ defaults: &defaults
         command: stack --stack-yaml=${STACK_FILE} install hoogle
 
     - run:
-        name: Build
+        name: Build (we need the exe for tests)
         command: stack -j 2 --stack-yaml=${STACK_FILE} install
 
+    - run:
+        name: Build Testsuite without running it
+        command: stack -j 2 --stack-yaml=${STACK_FILE}  build --test --no-run-tests
+
     - store_artifacts:
         path: ~/.local/bin
         destination: bin