Allow rust-highfive to label issues it creates.

Replace sets with lists.

src/tools/publish_toolstate.py

@@ -39,6 +39,19 @@ MAINTAINERS = {
     'rustc-dev-guide': {'mark-i-m', 'spastorino', 'amanjeev', 'JohnTitor'},
 }
 
+LABELS = {
+    'miri': ['A-miri', 'C-bug'],
+    'rls': ['A-rls', 'C-bug'],
+    'rustfmt': ['C-bug'],
+    'book': ['C-bug'],
+    'nomicon': ['C-bug'],
+    'reference': ['C-bug'],
+    'rust-by-example': ['C-bug'],
+    'embedded-book': ['C-bug'],
+    'edition-guide': ['C-bug'],
+    'rustc-dev-guide': ['C-bug'],
+}
+
 REPOS = {
     'miri': 'https://github.com/rust-lang/miri',
     'rls': 'https://github.com/rust-lang/rls',
@@ -132,6 +145,7 @@ def issue(
     assignees,
     relevant_pr_number,
     relevant_pr_user,
+    labels,
 ):
     # Open an issue about the toolstate failure.
     if status == 'test-fail':
@@ -155,6 +169,7 @@ def issue(
         )),
         'title': '`{}` no longer builds after {}'.format(tool, relevant_pr_number),
         'assignees': list(assignees),
+        'labels': labels,
     })
     print("Creating issue:\n{}".format(request))
     response = urllib2.urlopen(urllib2.Request(
@@ -235,7 +250,7 @@ def update_latest(
                 try:
                     issue(
                         tool, create_issue_for_status, MAINTAINERS.get(tool, ''),
-                        relevant_pr_number, relevant_pr_user,
+                        relevant_pr_number, relevant_pr_user, LABELS.get(tool, ''),
                     )
                 except urllib2.HTTPError as e:
                     # network errors will simply end up not creating an issue, but that's better