ASAN errors would be a lot more useful if they came with hs-err files. ASAN allows user callbacks into error report generation. We should use this in order to get both ASAN error reports and hs-err files+core dumps.

Note:

After this patch, the JVM will always produce hs-err files when an ASAN-report happens. It will *only* produce core files if ASAN_OPTIONS `disable_coredump=0` and `abort_on_error=1` and the JVM option `CreateCoredumpOnCrash` had not been disabled (and the limit for core file size is high  enough etc, all the usual restrictions on OS level still apply).

This means that - by default - ASAN builds will *not* generate cores, since ASAN default options inhibit that by setting `disable_coredump=1` and `abort_on_error=0`;