fixed bug #808

This is in regards to https://github.com/jordansissel/fpm/issues/808.

Issue https://github.com/jordansissel/fpm/issues/808 showed that the symbolic link behavior has changed. The fix to https://github.com/jordansissel/fpm/issues/658 lead to the behavior change. https://github.com/jordansissel/fpm/issues/658 highlighted that the ruby file handling changed between ruby 1.8.7 to ruby 1.9.3 . Unfortunately when it was fixed to work with the newer ruby 1.9.3 it lead to https://github.com/jordansissel/fpm/issues/808.

This fix should fix https://github.com/jordansissel/fpm/issues/658 and https://github.com/jordansissel/fpm/issues/808 for ruby 1.8.7 and ruby 1.9.3.