Update build.lock

This change updates the build.lock to include the following commits from
interface-hacluster:

5fc5216 Add monitor for stopped services when clone=False
5451d82 Drop six.
56710fd Update relation data even if the new value is empty

Closes-Bug: #1904623
Closes-Bug: #1953623
Change-Id: Ifd03b8d81dea52b1dfdc81679d34f366116579ab

src/build.lock

@@ -86,7 +86,7 @@
       "url": "https://github.com/openstack/charm-interface-hacluster.git",
       "vcs": null,
       "branch": "refs/heads/master",
-      "commit": "8125a7baecccf9b0869e515b92300dde3a86f31b"
+      "commit": "5fc5216f51dcf98530d45e137d55fd94b39d150a"
     },
     {
       "type": "layer",