Fix vpp-plugins rpms
Fix vpp-plugins rpms

vpp by default looks in /usr/lib/vpp_plugins
rpmbuild has ${_libdir} as /usr/lib64

Thus vpp doesn't see the plugins.

Change-Id: Iecbc491940678728305c181b04bb0914ad174bf1
Signed-off-by: Ed Warnicke <bd21dacf50ae0c2a81d439ae755251c53052fe92@cisco.com>
(cherry picked from commit 2dfd08242d66fb79c9a861c6a0c7fee45ef6bc60)

FDio/vpp,chrisy/vpp,GabrielGanne/vpp-flowtable,vpp-dev/vpp,chrisy/vpp,vpp-dev/vpp,milanlenco/vpp,vpp-dev/vpp,milanlenco/vpp,FDio/vpp,vpp-dev/vpp,chrisy/vpp,FDio/vpp,chrisy/vpp,vpp-dev/vpp,chrisy/vpp,GabrielGanne/vpp-flowtable,FDio/vpp,FDio/vpp,FDio/vpp,FDio/vpp,GabrielGanne/vpp-flowtable,GabrielGanne/vpp-flowtable,FDio/vpp,milanlenco/vpp,GabrielGanne/vpp-flowtable,vpp-dev/vpp,milanlenco/vpp,chrisy/vpp,chrisy/vpp,milanlenco/vpp,chrisy/vpp,GabrielGanne/vpp-flowtable,milanlenco/vpp,vpp-dev/vpp