minor question on the skia/dawn Android build

[William Candillon]

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Hello team,

From where we sit, the Skia Graphite support on mobile has come a long way. Lots of Android/iOS issues we were experiencing a few months ago are now completely gone. The latest Dawn APIs updates have been exciting too.

The only API missing for us is the Atlas API, but we are thinking of providing a polyfill for it.

On Android we do need to apply a tiny patch for Dawn to link on Android. In build_overrides/dawn.gni, `dawn_partition_alloc_dir ="//third_party/externals/partition_alloc"` needs to be unset; however, I didn't find a way to do it via the command line. Is it possible? And/Or should the linking error itself be reported as a bug?

Kind regards,

William