Update to Apache AsterixDB 0.9.8 and Hyracks 0.3.8

Change-Id:If17ec8dad1de435c9a0cceef4daa7ee1ebc3e5a3
Reviewed-on: https://asterix-gerrit.ics.uci.edu/c/incubator-asterixdb-site/+/16343
Reviewed-by: Ian Maxon <imaxon@uci.edu>
diff --git a/content/docs/0.9.8/images/linestring.svg b/content/docs/0.9.8/images/linestring.svg
new file mode 100644
index 0000000..f775e79
--- /dev/null
+++ b/content/docs/0.9.8/images/linestring.svg
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