dist: extend coredump size limit
dist: extend coredump size limit

16GB is not enough for some larger machines, so extend it.

Signed-off-by: Takuya ASADA <4ebfb6f510af412d6e89fefa3ab96d9c8b5e3fff@scylladb.com>
Message-Id: <1453115792-21989-2-git-send-email-4ebfb6f510af412d6e89fefa3ab96d9c8b5e3fff@scylladb.com>

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