fix: update linking for samples (#32)

Author: JustinBeckwith

packages/google-cloud-oslogin/.circleci/config.yml

@@ -71,7 +71,6 @@ jobs:
           command: |-
             mkdir -p /home/node/.npm-global
             npm install
-            npm link
             chmod +x node_modules/@google-cloud/nodejs-repo-tools/bin/tools
           environment:
             NPM_CONFIG_PREFIX: /home/node/.npm-global
@@ -114,9 +113,8 @@ jobs:
           name: Link the module being tested to the samples.
           command: |
             cd samples/
-            npm link ../
             npm install
-            cd ..
+            npm link ../
           environment:
             NPM_CONFIG_PREFIX: /home/node/.npm-global
       - run: