Bandaid fix for Issue #316

Bandaid fix for Issue #316

/usr/lib64/ruby/gems/1.9.1/gems/fpm-0.4.25/lib/fpm/package/rpm.rb:190:in `input': undefined method `directories' for #<RPM::File:0x00000000b05068> (NoMethodError)

Added an exception block to catch NoMethodError

Perhaps the rescue statement should actually do something here?