Fix link typo in gn cookbook doc.

BUG=none

Review URL: https://codereview.chromium.org/1266373002

Cr-Original-Commit-Position: refs/heads/master@{#341587}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 5087842b0c12776ce31876754346dc65c2382037
1 file changed
tree: bf29ecaa56d00417d53119149a267663e131258b
  1. tools/