GN bootstrap fails in PPA builds

[Chris Coulson]

The latest uploads (71548c4) all fail like this:

Building gn manually in a temporary directory for bootstrapping...
-- Generating build files with initial Generate Ninja
ERROR at build arg file (use "gn args <out_dir>" to edit):12:25: Build argument has no effect.
fatal_linker_warnings = false
                        ^----
The variable "fatal_linker_warnings" was set as a build argument
but never appeared in a declare_args() block in any buildfile.

To view all possible args, run "gn args --list <builddir>"
ERROR No targets.
I could not find any targets to write, so I'm doing nothing.
[0106/163659.319124:FATAL:err.cc(161)] Check failed: has_error_.

CMake Error at oxide/build/scripts/bootstrap-gn.cmake:68 (message):
  Failed to run Generate Ninja

CMake Error at oxide/build/cmake/ChromiumBuildShim.cmake:66 (message):
  Failed to bootstrap Generate Ninja binary
Call Stack (most recent call first):
  oxide/build/cmake/ChromiumBuildShim.cmake:298 (_bootstrap_gn)
  oxide/CMakeLists.txt:224 (run_generate_ninja)

-- Configuring incomplete, errors occurred!

[Chris Coulson (chrisccoulson)]

Urgh, it appears to be only some builds that are failing, and they reference a different build argument too.

[Chris Coulson (chrisccoulson)]

I've not seen this issue since