Fix PCL build by using type names instead of the actual types for era detection
Fix PCL build by using type names instead of the actual types for era detection

nodatime/nodatime,BenJenkinson/nodatime,BenJenkinson/nodatime,malcolmr/nodatime,jskeet/nodatime,nodatime/nodatime,jskeet/nodatime,malcolmr/nodatime,malcolmr/nodatime,malcolmr/nodatime