phab-refresh: use a special comment on the stable branch

Phabricator make it hard to spot the branch information. As a result patch
intended for stable are consistently queued for default.

We add a special command and flashy GIF to try to attract reviewer attention on
the fact patch are intended for stable.

Differential Revision: https://phab.mercurial-scm.org/D10464

contrib/heptapod-ci.yml

@@ -53,8 +53,14 b' phabricator-refresh:'
     stage: phabricator
     variables:
       DEFAULT_COMMENT: ":white_check_mark: refresh by Heptapod after a successful CI run (:octopus: :green_heart:)"
+      STABLE_COMMENT: ":white_check_mark: refresh by Heptapod after a successful CI run (:octopus: :green_heart:)\n⚠ This patch is intended for stable ⚠\n{image https://media.giphy.com/media/nYI8SmmChYXK0/source.gif}"
     script:
-      - "./contrib/phab-refresh-stack.sh --comment \"$DEFAULT_COMMENT\""
+      - |
+        if [ `hg branch` == "stable" ]; then
+            ./contrib/phab-refresh-stack.sh --comment "$STABLE_COMMENT";
+        else
+            ./contrib/phab-refresh-stack.sh --comment "$DEFAULT_COMMENT";
+        fi
 
 test-py2:
     <<: *runtests