fix missing xam-package target dependency before copy assemblies
fix missing xam-package target dependency before copy assemblies

rafd123/aws-sdk-net,rafd123/aws-sdk-net,mwilliamson-firefly/aws-sdk-net,mwilliamson-firefly/aws-sdk-net,mwilliamson-firefly/aws-sdk-net,rafd123/aws-sdk-net