KUDU-3096: Upgrade libunwind to 1.4.0
KUDU-3096: Upgrade libunwind to 1.4.0

libunwind 1.3.1 use malloc in thread stack trace collection,
that cause core dump and potential deadlock between GetThreadStack
and SuperviseThread, GetThreadStack function will try to collect
thread info even if tcmalloc ThreadCache haven't been inited completlly,
the issue happen in ARM64 server. In libunwind 1.4.0, upstream have
fixed malloc issue, so upgrade it.

Change-Id: Icc722cd5e8ed4ed668d279f6ec831e4eeb69f955
Reviewed-on: http://gerrit.cloudera.org:8080/15899
Tested-by: Kudu Jenkins
Reviewed-by: Grant Henke <4cf7ebbe638391c4d27a10cf751b99bdbd1a1880@apache.org>

helifu/kudu,helifu/kudu,helifu/kudu,helifu/kudu,helifu/kudu,helifu/kudu,helifu/kudu,helifu/kudu,helifu/kudu