[thirdparty] upgrade libunwind to 1.6.2

Change-Id: I1698c4a9ff1f07c640f0fcaf35d53e36b5f3c33f
Reviewed-on: http://gerrit.cloudera.org:8080/19853
Tested-by: Kudu Jenkins
Reviewed-by: Yingchun Lai <laiyingchun@apache.org>
diff --git a/thirdparty/vars.sh b/thirdparty/vars.sh
index 5dff3ac..7e48c57 100644
--- a/thirdparty/vars.sh
+++ b/thirdparty/vars.sh
@@ -137,7 +137,7 @@
 CRCUTIL_NAME=crcutil-$CRCUTIL_VERSION
 CRCUTIL_SOURCE=$TP_SOURCE_DIR/$CRCUTIL_NAME
 
-LIBUNWIND_VERSION=1.5.0
+LIBUNWIND_VERSION=1.6.2
 LIBUNWIND_NAME=libunwind-$LIBUNWIND_VERSION
 LIBUNWIND_SOURCE=$TP_SOURCE_DIR/$LIBUNWIND_NAME