List only files under the directories

According to Fedora's RPM packaging document [1], "do not list %{_bindir}".
Add "/*" to cover only the files under the directories, not including the directories themselves.

1: https://fedoraproject.org/wiki/How_to_create_an_RPM_package#.25files_section
Merge pull request #2 from tomykaira/patch-1

List only files under the directories