gn: fix bootstrap script

Review-Url: https://codereview.chromium.org/2446643002
Cr-Original-Commit-Position: refs/heads/master@{#427094}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 03c1d5ac093a45294eb59714db7f158de4631f54
1 file changed
tree: 68507958cde33423887bbad4d9a5b50c8f6be759
  1. tools/