gn bootstrap: Don't pass removed dupbuild ninja option

Ninja removed the `-w dupbuild` option in its v1.12.0 release (the
exact commit is https://github.com/ninja-build/ninja/commit/8f47d5aa).
The behaviour previously achieved by passing `-w dupbuild=err` is now the default.

Bug: None
Change-Id: I95174e15998ba0155a828c5d5cacdde98fcdfb53
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5522398
Reviewed-by: Dirk Pranke <dpranke@google.com>
Commit-Queue: Max Ihlenfeldt <max@igalia.com>
Reviewed-by: Thomas Anderson <thomasanderson@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1297998}
NOKEYCHECK=True
GitOrigin-RevId: 93801ea19df27968e3592f3113f195a874f2bc42
1 file changed
tree: 6c8fd035fc50268bc294c0a59f3b732b789790ef
  1. bootstrap/
  2. tutorial/
  3. README.md
  4. roll_gn.py
README.md

GN now lives at https://gn.googlesource.com/.

To roll the latest version of GN into Chromium:

  1. Create a new Git branch.
  2. Run python tools/gn/roll_gn.py; this will modify //DEPS and //buildtools/DEPS to point to the most recent revision of GN and create a commit with a list of the changes included in the roll.
  3. Run git-cl upload to upload the commit as a change for review.

If you don't want to roll to the latest version, you can specify the SHA-1 to roll to use as an argument to the script, and it will be used instead.