Updated gitignore to not have platform build-files under version control
Updated gitignore to not have platform build-files under version control

bgregg/pvta-multiplatform,bgregg/pvta-multiplatform,bgregg/pvta-multiplatform,bgregg/pvta-multiplatform,bgregg/pvta-multiplatform,bgregg/pvta-multiplatform,bgregg/pvta-multiplatform