Patch: support callback on allocation overflow instead of calling abort()

[Colin Caine]

This is used by Julia to raise an OutOfMemory exception rather than having
the Julia process itself abort.

Others on stackoverflow, etc, have experienced similar problems with
undesired aborts(), so this patch would probably be useful to a variety of
users. (see:
https://github.com/JuliaLang/julia/issues/8286#issuecomment-323500953)

More information is available here and in the linked issues and PRs:
https://github.com/JuliaLang/julia/pull/31215

Thanks,
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