This is an attempt to apply the suggestions from #3316 to the fuzzing
infrastructure for the `wasmtime` target. This will hopefully allow the
delivery of SIGSEGV and SIGILL signals to the `wasmtime` program itself.
These are expected signals when executing wasm code so we don't want the
fuzzer to treat all forms of the signal as a fatal error.
This commit does for Rust code what the `CFLAGS` are configured to do
for C++ code, which is to enable debuginfo (but line tables only) as
well as forcing frame pointer generation to all assist in generating
stack traces.
This is an attempt to fixup the errors found on #3292. Although I'm not
certain where the error was coming from this switches the Rust
installation to being in `PATH` by default so there's no need to
`source` any scripts to get access to the Rust compiler.
Nick Fitzgerald