LU-954 build: make lbuild to build lustre-iokit

LU-954 build: make lbuild to build lustre-iokit

Add additional codes in lbuild to build lustre-iokit rpm.
It should be noarch because it's independent of any arch.
Add info to Changelog and change iokit version to 1.3.0

Signed-off-by: Minh Diep <mdiep@whamcloud.com>
Change-Id: I8b3c0bbaf348c350155d7c50e9ffcb4ec92fe1ff
Reviewed-on: http://review.whamcloud.com/1907
Tested-by: Hudson
Reviewed-by: Brian J. Murrell <brian@whamcloud.com>
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Michael MacDonald <mjmac@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>