part of #1189 upgrade sbt-pack to 0.7.5
part of #1189 upgrade sbt-pack to 0.7.5

manuzhang/incubator-gearpump,manuzhang/incubator-gearpump,manuzhang/incubator-gearpump,manuzhang/incubator-gearpump,manuzhang/incubator-gearpump