flapjack: add to repurposed jtag list to use on v2

This ensures flapjack can be used on servo v2

BUG=b:123057228
BRANCH=none
TEST=1:) In chroot run
	'cros_workon --host start dev-util/hdctools'
	'sudo emerge dev-util/hdctools'
     2:) Run 'servod -b flapjack' with no error.

Change-Id: Ief4e4a3c7f0d92ebb70ea8eddbbe7c41c4923adb
Reviewed-on: https://chromium-review.googlesource.com/1421457
Commit-Ready: Kaka Ni <nigang@huaqin.corp-partner.google.com>
Tested-by: Kaka Ni <nigang@huaqin.corp-partner.google.com>
Reviewed-by: Kaka Ni <nigang@huaqin.corp-partner.google.com>
Reviewed-by: Nick Sanders <nsanders@chromium.org>
Reviewed-by: YH Lin <yueherngl@chromium.org>
1 file changed