pmb:cross-native2 should be opt-in, not the default
Regression from !2474 (merged): pmb:cross-native2 is the default for some reason, instead of being opt-in.
See also:
@caleb: can you take a look and prepare a patch to make it opt-in? otherwise I can look into it over the weekend.
From a quick glance: maybe we might need to return "kernel" as default in pmb.build.autodetect.crosscompile() now?
CC: @sicelo (FYI in case you have been wondering why the build failed on bpo)