Export GNUPGHOME also for dput

Change-Id: I8d9da8599caad40bf840fd5878f6c1581fbbb773
diff --git a/src/com/mirantis/mk/Debian.groovy b/src/com/mirantis/mk/Debian.groovy
index d7a1fae..05ec4b1 100644
--- a/src/com/mirantis/mk/Debian.groovy
+++ b/src/com/mirantis/mk/Debian.groovy
@@ -204,7 +204,7 @@
           }
 
           sh("export GNUPGHOME=${workspace}/.gnupg; debsign --re-sign -k ${gpg_key_id} *.changes")
-          sh("dput -f \"ppa:${ppaRepo}\" *.changes")
+          sh("export GNUPGHOME=${workspace}/.gnupg; dput -f \"ppa:${ppaRepo}\" *.changes")
         }
     }
 }
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