Make version sorting work on ruby 1.9 (cf lts)
Make version sorting work on ruby 1.9 (cf lts)

[#145211249]

Signed-off-by: Dave Goddard <bfcdf3e6ca6cef45543bfbb57509c92aec9a39fb@goddard.id.au>

cloudfoundry-community/asp.net5-buildpack