add Ruby 2.3.0 [#110759512]
add Ruby 2.3.0 [#110759512]

Signed-off-by: Min Su Han <284323d9cf82eb7cf7a6fdac79e0846042869096@gmail.com>

ekaranto/rails4-bluemix-buildpack,ekaranto/rails4-bluemix-buildpack,cloudfoundry/ruby-buildpack,cloudfoundry/ruby-buildpack,ekaranto/rails4-bluemix-buildpack,jumptvs/BP_Ruby,jumptvs/BP_Ruby,jumptvs/BP_Ruby,cloudfoundry/ruby-buildpack,cloudfoundry/ruby-buildpack,jumptvs/BP_Ruby,ekaranto/rails4-bluemix-buildpack,cloudfoundry/ruby-buildpack