Adding GOPATH/bin into PATH for gdm

Change-Id: I806cb04c25911a4f74078dc534221d8a89eb0b4b
diff --git a/build-debian-packages-prometheus-relay.groovy b/build-debian-packages-prometheus-relay.groovy
index 8c89e52..a8b7706 100644
--- a/build-debian-packages-prometheus-relay.groovy
+++ b/build-debian-packages-prometheus-relay.groovy
@@ -51,8 +51,8 @@
                     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 &&
+                        export PATH=\$PATH:\$GOPATH/bin:\$GOROOT/bin &&
                         cd src/gerrit.mcp.mirantis.net/debian/prometheus-relay &&
                         make""")
                 }