llvm: add rust and dlang demanglers to the fuzzers list

[ljmf00]

Signed-off-by: Luís Ferreira contact@lsferreira.net

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Add dlang as llvm/llvm-project@9af467e got merged and missing rust fuzzer.

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[ljmf00]

@googlebot I signed it!

[ljmf00]

@dwblaikie Since you are a Googler and you are also familiar with LLVM, can you review this, or do you know anyone to ping this?

In the meanwhile, I'm going to make another one to fix deprecation issues due to this being very outdated, although I don't expect the CI to run anyway since linking LLVM on Github actions triggers the kernel OOM killer due to low memory.

Is there any --reduce-memory-overheads --no-keep-memory similar combination flag to trigger when building on a low memory machine?

[maflcko]

They are now in https://github.com/google/oss-fuzz/blob/master/projects/llvm/build.sh#L33 , so I think this can be closed?