LU-98 Fix defects in bug 14949 implementation

LU-98 Fix defects in bug 14949 implementation

Some of the details of the implentation of bug 14949 "integrate
lustre-iokit into normal build process" were incorrect.  This was leading
to a problem when trying to build with "make rpms" after configuring without
the iokit.

Signed-off-by: Brian J. Murrell <brian@whamcloud.com>
Change-Id: Id064c688d63e3e70a90b725e49831b9c319229f0
Reviewed-on: http://review.whamcloud.com/294
Tested-by: Hudson
Reviewed-by: Robert Read <rread@whamcloud.com>
Reviewed-by: Michael MacDonald <mjmac@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>