Apply memory limits during fuzzing #1340
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This PR enables the newly added
mxXSMemoryLimitthat tracksmxNoChunksallocator and aborts the machine when the provided limit is exceeded. It allows us to gracefully handle fuzzer test cases to avoid reporting JS code that allocates beyond the fuzzer limits as bugs.In fuzzing builds, we also use a function that purges all memory that we call on abort paths. This makes previous work to tune ASAN's leak sanitizer unnecessary (#1067). We removed it as it had no effect.