Bug 1289643 - Add $ to regular expression in hg-shared cache name; r=dustin

All the other expressions are anchored via ^ and $.

MozReview-Commit-ID: BkCbZZUnwK6

--HG--
extra : rebase_source : 0dc6c7577898e447946217494e5cd491b13e22fa

taskcluster/taskgraph/task/legacy.py

@@ -151,7 +151,7 @@ def remove_caches_from_task(task):
     """
     whitelist = [
         re.compile("^level-[123]-.*-tc-vcs(-public-sources)?$"),
-        re.compile("^level-[123]-hg-shared"),
+        re.compile("^level-[123]-hg-shared$"),
         re.compile("^tooltool-cache$"),
     ]
     try: