Makefile: opensuse 15.0 reporting change
Makefile: opensuse 15.0 reporting change

A change in /etc/os-release reporting for opensuse leap15.0
means this change is required so that builds are allowed.

Change-Id: I35fb55a4c63b5d6d9d313c7e75ff6b039280df96
Signed-off-by: Ed Kern <0096b4be86d05f41709f5b9c469488703d2580ec@cisco.com>

vpp-dev/vpp,FDio/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,vpp-dev/vpp,vpp-dev/vpp,vpp-dev/vpp,FDio/vpp,FDio/vpp,vpp-dev/vpp,chrisy/vpp,chrisy/vpp,chrisy/vpp,vpp-dev/vpp,FDio/vpp,FDio/vpp,vpp-dev/vpp,FDio/vpp,chrisy/vpp