add Hastructure (commercialhaskell/stackage#7796)

Author: juhp

build-constraints/lts-24-build-constraints.yaml

@@ -3867,6 +3867,9 @@ packages:
     "XT <e@xtendo.org> @xtendo-org":
         - rawfilepath ^>= 1.1.1
 
+    "Xiaoyu Zhang <always.zhang@gmail.com> @yellowbean":
+        - Hastructure
+
     "Konstantin Zudov <co@zudov.me> @zudov":
         - html-email-validate ^>= 0.2.0.0