R58: update afdo profile for clang in ebuild.

This is a R58-only workaround to update ebuilds for boards built with
clang.  It only updates ebuild with latest afdo profile for clang;
The clang profile must be generated beforehand.

BUG=chromium:696719
TEST=none

Change-Id: I27812287b6b06fc8dfa72be52bf73ba1d2ff643f
Reviewed-on: https://chromium-review.googlesource.com/469171
Reviewed-by: Bernie Thompson <bhthompson@chromium.org>
Reviewed-by: Don Garrett <dgarrett@chromium.org>
Commit-Queue: Ting-Yuan Huang <laszio@chromium.org>
Tested-by: Ting-Yuan Huang <laszio@chromium.org>
Trybot-Ready: Ting-Yuan Huang <laszio@chromium.org>
diff --git a/cbuildbot/stages/afdo_stages.py b/cbuildbot/stages/afdo_stages.py
index 2378991..ad9d4c8 100644
--- a/cbuildbot/stages/afdo_stages.py
+++ b/cbuildbot/stages/afdo_stages.py
@@ -93,7 +93,7 @@
     # board is None iff master-chromium-pfq. That means we need to update both
     # afdos for gcc(produced on samus) and llvm(produced on chell).
     # TODO: Remove this after the transition is done.
-    afdoboards = [board] if board else ['samus', 'chell']
+    afdoboards = ['samus', 'chell']
     for afdoboard in afdoboards:
       arch_profiles = {}
       afdo.InitGSUrls(afdoboard, reset=True)