Jenkinsfile: stashed paths retain their directory.

Jenkinsfile

@@ -25,7 +25,7 @@ node {
      docker.image('cdrx/fpm-debian:8').inside {
          stage 'package'
          unstash 'binary'
-         sh 'mv jwt-tokenissuer /src/'
+         sh 'mv dist/linux-amd64/jwt-tokenissuer /src/'
          sh 'fpm -s dir /src=/opt/jwt-tokenissuer -t deb -n jwt-tokenissuer -v \$VERSION_STRING'
          archive includes: '*.deb'
      }