Guard against find_bad_constructs on nacl (again) ANGLE's BUILD.gn also referenced find_bad_constructs on nacl builds without a guard. Confirmed locally that gn gen now works on nacl. Bug: chromium:1410835 Change-Id: I1258b2841d5afa4421776ea0c412ff0e9bed135e Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/5815990 Commit-Queue: Geoff Lang <geofflang@chromium.org> Reviewed-by: Zhenyao Mo <zmo@chromium.org>