Exclude prepare-dirs from bin package

Prepare-dirs on i586 platforms end up in the same directory as the
other lib files so it would get automatically included in the bin
package. To prevent this only "*.so*" files are included in the bin
package from this directory.

fixes #8126

Signed-off-by: Gunnar Beutner <gunnar.beutner@netways.de>

icinga2.spec

@@ -452,7 +452,8 @@ exit 0
 %{_sbindir}/%{name}
 %exclude %{_libdir}/%{name}/libdb_ido_mysql*
 %exclude %{_libdir}/%{name}/libdb_ido_pgsql*
-%{_libdir}/%{name}
+%dir %{_libdir}/%{name}
+%{_libdir}/%{name}/*.so*
 %{_datadir}/%{name}
 %exclude %{_datadir}/%{name}/include
 %{_mandir}/man8/%{name}.8.gz