LU-12202 misc: remove obsolete contrib files

nn-final-symbol-list.txt: originally used for Solaris port
mptlinux.spec.patch: for ancient SCSI drivers
01-dont-include-openib-initscript-rhel5.ed: old RHEL5 patch
rdac_spec: old driver file

I only wish there was a "really_trivial" keyword...

Test-Parameters: trivial
Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Change-Id: If66db22caf604736949e18289af74cc4f0fa6613
Reviewed-on: https://review.whamcloud.com/34719
Reviewed-by: Arshad Hussain <arshad.super@gmail.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Shaun Tancheff <stancheff@cray.com>
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>