Fixes an error during module-assistant build step:
install: cannot stat `openvswitch/datapath/linux/*_mod.ko': No such
file or directory
This was (understandably) overlooked as part of commit
9b80f761be
(datapath: omit _mod from module names).
Acked-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Ben Pfaff <blp@nicira.com>