update hooks: slip in public link overlay

For people who have link builds already, regen their board configs
so that they also include the public overlay.

BUG=chromium:269196
TEST=`cbuildbot link-full link-release` both work
CQ-DEPEND=CL:174430

Change-Id: Iadd7ec612a28162d93384628dd1e4cd988f4be97
Reviewed-on: https://chromium-review.googlesource.com/174431
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
diff --git a/chroot_version_hooks.d/73_link_go_public b/chroot_version_hooks.d/73_link_go_public
new file mode 100644
index 0000000..c65987b
--- /dev/null
+++ b/chroot_version_hooks.d/73_link_go_public
@@ -0,0 +1,14 @@
+# Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# We moved a lot of files to the public overlay.  Make sure we regen the
+# boards profile settings and such so we pull in the public bits.
+BOARD=link
+
+if [[ -d /build/${BOARD} ]]; then
+  ~/trunk/src/scripts/setup_board \
+    --board=${BOARD} \
+    --skip_chroot_upgrade \
+    --regen_configs
+fi