Tests are segfaulting on 32-bit platforms

[alexcrichton]

Found via #43, replicated locally with:

$ cargo test -p component-async-tests --target i686-unknown-linux-gnu

Note that this requires disabling debug_info(true) in tests which also isn't supported in Pulley right now for (presumably) unrelated reasons that I'll fix elsewhere. Neverthless I wanted to file an issue for a FIXME

[alexcrichton]

Specifically if bytecodealliance/wasmtime#10305 is merged over here then tests will fail becuase they generate debug info. If debug info is turned off then the tests will segfault. The relevant commit is ec939fe