Fix string in pipeline

Change-Id: Idb8649f22f6c0a3de2cf472e8694a5d851b43645
diff --git a/build-debian-packages-telegraf.groovy b/build-debian-packages-telegraf.groovy
index 89c29a4..2303e56 100644
--- a/build-debian-packages-telegraf.groovy
+++ b/build-debian-packages-telegraf.groovy
@@ -48,12 +48,12 @@
             }
             stage("build package") {
                 img.inside{
-                    sh("wget https://storage.googleapis.com/golang/go1.8.1.linux-amd64.tar.gz &&
-                        tar xf go1.8.1.linux-amd64.tar.gz &&
-                        export GOROOT=$PWD/go &&
-                        export PATH=$PATH:$GOROOT/bin &&
-                        export GOPATH=$PWD &&
-                        cd src/github.com/influxdata/telegraf &&
+                    sh("wget https://storage.googleapis.com/golang/go1.8.1.linux-amd64.tar.gz && \
+                        tar xf go1.8.1.linux-amd64.tar.gz && \
+                        export GOROOT=$PWD/go && \ 
+                        export PATH=$PATH:$GOROOT/bin && \
+                        export GOPATH=$PWD && \
+                        cd src/github.com/influxdata/telegraf && \
                         scripts/build.py --package --version=\"${version}\" --platform=linux --arch=amd64")
                 }
                 archiveArtifacts artifacts: "${workingDir}/*.deb"