With WT-2402 complete, we should now be able to let the UBSAN builder check for misaligned accesses, by removing this line:
https://github.com/mongodb/mongo/blob/db285e7c7b8026617e33b43713df26c49b476d20/src/third_party/wiredtiger/SConscript#L15-L19
WT-2402 Misaligned structure accesses lead to undefined behavior