Broken irssi build (MSan)

[Dor1s]

https://oss-fuzz-build-logs.storage.googleapis.com/index.html

Step #10: + check_startup_crash /workspace/out/memory/irssi-fuzz
Step #10: + local FUZZER=/workspace/out/memory/irssi-fuzz
Step #10: + local CHECK_PASSED=0
Step #10: + [[ libfuzzer = libfuzzer ]]
Step #10: ++ /workspace/out/memory/irssi-fuzz -runs=4
Step #10: ++ egrep 'Done 4 runs' -c
Step #10: + CHECK_PASSED=0
Step #10: + ((  0 == 0  ))
Step #10: BAD BUILD: the fuzzer seems to have either startup crash or exit.
Step #10: + echo 'BAD BUILD: the fuzzer seems to have either startup crash or exit.'
Step #10: + exit 1

[Dor1s]

There is a crash (https://oss-fuzz.com/v2/testcase-detail/6186977655259136) that happens all the time: https://oss-fuzz.com/v2/performance-report/libFuzzer_irssi_irssi-fuzz/libfuzzer_msan_irssi/2017-09-06

It's quite straightforward that something is not instrumented if you look at the stacktrace.

And the build script is linking a couple of libraries that are not instrumented: https://github.com/google/oss-fuzz/blob/master/projects/irssi/build.sh#L44

I'll disable MSan for irssi for now.