Update Nimbus.spec due to backward compatibility issue 

multiple 'framework' settings is no longer valid way to specify multiple frameworks. Use 'frameworks' setting instead.
Update Nimbus.spec due to backward compatibility issue 

Multiple 'framework' settings is no longer valid way to specify multiple frameworks. Use 'frameworks' setting instead.
Update Nimbus.spec due to backward compatibility issue 

multiple 'framework' settings is no longer valid way to specify multiple frameworks. Use 'frameworks' setting instead.
Merge pull request #2328 from aviell/master

[Fix] Update Nimbus.spec due to backward compatibility issue of the framework build setting