tgt: fix conffiles section

Remove the leading tab

Reported-by: Maxim Storchak <m.storchak@gmail.com>
Signed-off-by: Florian Fainelli <florian@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/packages@40708 3c298f89-4303-0410-b956-a3cf2f4a3e73